According to anthropology, if humanity cannot be divided into a series of genetically distinct units, then?
Answers
According to anthropology, if humanity cannot be divided into a series of genetically distinct units, then the concept of human race will be biologically meaningless.
According, to the concept of human race that give the idea of the human species and said that human species is divided into distinct groups on the basis of the inherited physical and behavioral differences.
Their are 4 major races present in the world's population, that are white/caucasian, mongoloid/asian, negroid/black, and australoid. This racial classification was suggested by carleton S.
The human race was invented by european naturalists and anthropologists. The human race was initiated from the homo habilis, or handy mam.
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Related Questions
middle which diagram shows the changes in appearance of a plant cell when a remains in a concentrated sugar solution for thirty minutes? what is th answer
Answers
The osmosis diagram is the one that most accurately represents how a plant cell might change in appearance after spending thirty minutes in a concentrated sugar solution.
Osmosis is the process by which water molecules move from an area with a lower concentration of solutes to an area with a higher concentration of solutes across a semi-permeable membrane.
If a concentrated sugar solution were present, the solute concentration outside the plant cell would be higher than that inside.
Water from inside the plant cell would naturally try to exit the cell as it is submerged in the concentrated sugar solution in an effort to balance the solute concentration on either side of the cell membrane.
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The primary difference between active transport and facilitated diffusion is that active transport is the only one in which
A) [S]high → [S]low.
B) transporter proteins are required.
C) [S]low → [S]high.
D) the concentration gradient provides the necessary energy for movement.
Answers
The correct answer is B) transporter proteins are required. Facilitated diffusion and active transport are both mechanisms for moving molecules across a membrane, but they differ in the energy requirements and the use of transporter proteins.
Facilitated diffusion relies on a concentration gradient and uses transporter proteins to move molecules from high to low concentration, but it does not require energy input. In contrast, active transport moves molecules against their concentration gradient, which requires energy input from ATP hydrolysis or other sources, and it always involves transporter proteins to facilitate movement.
Therefore, the key difference between the two processes is the requirement of transporter proteins for active transport.
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The model shows how pimples are formed in the skin. Why do you think this process can occasionally lead to pain?
A. The swollen pimple completely stops blood flow to the area, starving the nerves. B. The bacteria replication leads to swelling, which irritates nerves in the dermis.
C. The nerves around the pore cannot transmit an action potential, so they can’t send signals.
D. The pimple presses on the epidermis, which is where all the sensory receptors in the skin are located.
Answers
Answer:
The bacteria replication leads to swelling, which irritates nerves in the dermis Explanation:
so B is your answer
hope this helps you
Answer:
The bacteria replication leads to swelling, which irritates nerves in the dermis
Explanation:
plato
9. A mutation must have either a positive or negative impact on a species. True or False
Answers
Answer:
False
Explanation:
Most mutations are neutral, meaning they have no significant effect on the organism's fitness or survival. They may occur in non-coding regions of DNA, or they may result in silent changes to the amino acid sequence of a protein. Neutral mutations can accumulate over time and may provide a source of genetic variation that can be acted upon by natural selection in the future.
Explain the role of aquaporins in the rapid movement of water through some cells
Answers
Answer:
In the early 1990s, aquaporins were discovered, and it was found that they can selectively control water movement into and out of cells. One of the critical functions of aquaporins is that while they allow the passage of water they prevent the passage of ions.
The Gulf of Mexico dead zone is an area of hypoxic waters at the mouth of the Mississippi River. Its area varies in size, but can cover up to 6,000-7,000 square miles. The zone occurs between the inner and mid-continental shelf in the northern Gulf of Mexico, beginning at the Mississippi River delta and extending westward to the upper Texas coast. Thousands of farms are located along the Mississippi River and its tributaries and as water washes into the river after a heavy rain, it brings with it nutrients from fertilizers added to farmland. These materials flow downriver and eventually enter the Gulf of Mexico, where they create conditions for a dead zone: an area of low to no oxygen that results in the death of fish and other marine life. The Gulf of Mexico is a major source area for the seafood industry. The Gulf supplies 72% of U.S. harvested shrimp, 66% of harvested oysters, and 16% of commercial fish. Consequently, if the hypoxic zone continues or worsens, fishermen and coastal state economies will be greatly impacted. What can be done to minimize the Gulf dead zone? Choose ALL that could apply. A) Control of animal wastes so that they are not allowed to enter into waterways. B) Adjust the timing of fertilizer applications to limit runoff of excess nutrients from farmland. C) Monitor septic systems and sewage treatment facilities to reduce discharge of nutrients to surface water and groundwater. D) Restrict land use in the areas surrounding the Mississippi delta to exclude industrial sites. E) Counter the effects of fertilizers on algal growth in the Gulf with the use of chemical herbicides.
Answers
The things that should be done to minimize the Gulf dead zone include:
A. Control of animal wastes so that they are not allowed to enter into waterways. B. Adjust the timing of fertilizer applications to limit runoff of excess nutrients from farmland.E. Counter the effects of fertilizers on algal growth in the Gulf with the use of chemical herbicides.It should be noted that it's important to manage nutrients efficiently in farmlands through the restoration of wetlands in order to capture nutrients and then reduce runoff.
In order to minimize the Gulf dead zone, there should be control of animal wastes so that they are not allowed to enter into waterways. Also, there should be an adjustment of the timing of fertilizer applications to limit runoff of excess nutrients from farmland.
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Describe the nucleus of an atom
Answers
Answer:
The nucleus of an atom contains the atom's protons and neutrons. It is the higher concentrated region of the atom that contributes to most of its weight. It has a positive charge because the protons are positively charged and the neutron is uncharged.
hope it helps.
Hybridization between two species from different genus is known as __________
Answers
Answer:
interspedric hyprisation
Today we understand that our ethnic culture plays a significant role in who we are, how we act, and how we think. How would the PPCT model classify this factor in our development?
Answers
The PPCT model would classify the role of ethnic culture in our development as part of the Person (P) component.
The PPCT model, developed by ecological psychologist Urie Bronfenbrenner, examines the dynamic interaction between four key elements: Person (P), Process (P), Context (C), and Time (T). In this model, the Person component refers to the characteristics, traits, and attributes of an individual that influence their development.
Ethnic culture, which encompasses shared beliefs, values, customs, traditions, and behaviors within a specific ethnic group, is a personal characteristic that shapes an individual's identity, worldview, and socialization. It influences how individuals perceive themselves and others, their social interactions, and their cultural practices. It plays a significant role in shaping an individual's attitudes, behaviors, and thinking patterns.
Understanding and acknowledging the impact of ethnic culture on development is essential for recognizing the diversity and uniqueness of individuals and for promoting cultural sensitivity and inclusivity. The PPCT model emphasizes the importance of considering the Person component, including ethnic culture, when examining human development within various contexts and over time.
The PPCT model would classify the role of ethnic culture in our development as part of the Person component. Ethnic culture significantly influences how individuals perceive themselves and others, their social interactions, and their cultural practices. Recognizing the impact of ethnic culture is crucial for promoting cultural sensitivity and understanding in the study of human development
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What are the functions of an enzyme in a metabolic reaction? (Choose all that apply.)
aligning the parts of substrates that need to connect to form a product.
Obringing substrates closer together so they are more likely to react
binding to ions to form a substrate
lowering the energy it takes for a reaction to occur or speeding up a reaction
Answers
Answer:
In a metabolic reaction an enzyme has the function of:
Aligning the parts of substrates that need to connect to form a product.Lowering the energy it takes for a reaction to occur or speeding up a reaction.Explanation:
Enzymes are biological catalysts of a protein nature, in charge of decreasing the energy needed for a metabolic reaction to occur.
One of the characteristics of enzymes is their specificity for a substrate. The union between the enzyme and the substrate occurs when the substrate binds to a place in the enzyme called the active site. For this to occur, the enzyme adapts the configuration of its active site so that it attaches to the substrate, functioning like a key in a lock.
The main function of the enzyme is to make a reaction faster and to reduce the amount of energy needed for that reaction.
For this reasons enzymes can:
Aligning the parts of substrates that need to connect to form a product.Lowering the energy it takes for a reaction to occur or speeding up a reaction.The other options are wrong because:
- It is not an enzymatic function to bring the substrates closer together so that they can react.
- Enzymes do not bind to ions to form substrates, they bind to a substrate to obtain a product.
How could one visually distinguish a
monocot root from a dicot root? How could one
visually distinguish between the cross-section of
a monocot root and dicot root?
Answers
Answer:
Monocots have flower parts in threes or multiples of threes as shown in the flowers to the left. Dicots have flower parts in multiples of fours or fives like the five-petaled dicot flower
Explanation:
Answer:
by the arrangement of the xylem and phloem.
Explanation:
In a dicot, the xylem and phloem form an X or Y shape compared to the monocot are arranged in a ring formation.
Gives rise to cork cambium, parts of the vascular cambium, and lateral roots Gives rise to lateral roots only
Vascular Tissues
Has a limited number of Xylem and Phloem Has a higher number of Xylem and Phloem
Shape of Xylem
What are the four major stem cell sources currently being investigated?
Answers
The four major stem cell sources currently being investigated are:
Embryonic stem cells (ESCs): These are derived from the inner cell mass of a blastocyst, a very early-stage embryo.
Adult stem cells (ASCs): These are found in various tissues and organs of the body, such as bone marrow, brain, skin, and muscle.
Induced pluripotent stem cells (iPSCs): These are generated from somatic cells, such as skin or blood cells, that are reprogrammed to an embryonic-like state through the introduction of specific transcription factors.
Perinatal stem cells: These are obtained from the tissues that surround the fetus and include amniotic fluid stem cells, umbilical cord blood stem cells, and placental stem cells.
Each of these sources has unique properties and potential advantages for various applications in regenerative medicine, disease modeling, and drug discovery. However, there are also ethical, safety, and technical challenges associated with each of these sources that need to be carefully considered and addressed.
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What are the properties of water? Select all that apply. a) low heat of vaporization
b) high specific heat
c) high boiling point
d) surface tension
e) low specific heat
f) high solid density
g) low solid density
h) high heat of vaporization
i) low boiling point
Answers
c) high boiling point - strong intermolecular forces
d) surface tension - strong molecule attraction
f) low solid density - hydrogen bonding means ice less dense than liquid
h) high heat of vaporisation - strong hydrogen bonds require higher energy to break bonds and change phase
PLEASE HELP I WILL MARK BRAINLIEST!!!!!!
To get a pure bred colored, you choose several colored flower plants, and let them self-fertilize,
then you plant and grow the seeds. Many of the self-fertilized plants have some colored and
some white flower offspring. You choose one of the plants from a family of all colored flower
plants, let it self-fertilize, then you plant and grow its seeds. All the plants you get have colored
flowers. Now what?
A. This colored flower
plant is pure-bred.
B. This isn't a pure-bred plant, you
need to start all over again.
C. The white flower plant (after it self-
fertilizes) will give pure-bred colored
flowers in the next generation.
Answers
Answer:
They are easy to grow & they have many traits that distinguish strains of pea ... Choose several of the colored flower plants, self-fertilize them, then plant and ... To get a pure-bred colored, you choose several colored flower plants, and let ... Many of the self-fertilized plants have some colored and some white flower offspring.
Explanation:
Complete the following Punnett Square (A = axial flowers a = terminal flowers):
Aa x aa Genotypic ratio:
Phenotypic ratio:
Answers
Answer:
Phenotype: 50% chance of being axial or terminal flowers
Genotype: Aa = 50% , aa = 50%
Explanation:
Punnett Square
__A___a__
a l Aa l aa l
a | Aa l aa l
This is how the punnett square would be completed.
The phenotype would be the physical aspects of the organism.
(axial flower/terminal flower)
The genotype would be the calculations of the punnett square.
(Aa=50%, aa=50%)
*If someone has a better answer or way of explaining give it a try
Explain how the villi and the alveoli are adapted to absorb molecules into the bloodstream. (6 marks)
Answers
Answer:
they have Well supplied blood vessels which carry away absorbed food. Lacteal present which transports absorbed lipids away from Small Intestine
Villi and alveoli both are filled with rich network of blood capillaries, and the blood constantly moves through them that maintains a steep concentration gradient.
What are blood capillaries?Capillaries are the thinnest blood vessels. Capillaries are delicate vessels which exist throughout the body. They transport blood, nutrients and oxygen to all the cells in organs and all the organ systems. Capillaries are the smallest blood vessels of the vascular system.
The alveoli present in the lungs are covered with a rich blood supply of capillaries. This network provides a diffusion gradient for the gases through which oxygen move into the blood and carbon dioxide move into the lungs. The alveoli are highly folded which gives them high surface area: volume ratio for gaseous exchange. The alveolar walls are one-celled thick which makes it easy for the gases to diffuse across.
This gradient produced by the capillary network in the villi increases the amount of dissolved, digested food that can be absorbed into the bloodstream from the alveoli of small intestine.
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Please help! 100 points
Answers
Answer:
i need help to with this
Explanation:
muscle cells can use the _____ energy system to obtain energy. group of answer choices pcr-atp oxygen lactic acid all of these are correct.
Answers
Muscle cells can use all of the following energy systems to obtain energy: phosphocreatine (PCr)-ATP system, aerobic system (oxygen), and anaerobic glycolysis (lactic acid).
Muscle cells have different energy systems available to produce ATP (adenosine triphosphate), which is the primary source of energy for muscle contractions. The phosphocreatine (PCr)-ATP system provides immediate energy for short bursts of high-intensity activity. PCr stores in the muscles are rapidly broken down to regenerate ATP, allowing for quick energy replenishment. The anaerobic glycolysis system, also known as the lactic acid system, provides energy in the absence of sufficient oxygen. It breaks down glucose to produce ATP, but with the byproduct of lactic acid. This system is utilized during intense exercise when oxygen demand exceeds supply.In summary, muscle cells can utilize all of these energy systems depending on the intensity and duration of the activity. The PCr-ATP system provides immediate energy, the aerobic system is predominant for endurance activities, and the anaerobic glycolysis system is involved in high-intensity, short-duration activities.
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Match each part of the endocrine system with the correct label.
Answers
Answer:
Your numbers are
1 Pineal gland
2 Hypothalamus
3 Pituitary Gland
4 Thyroid Gland
5 Thymus
6 Pancreas
7 Adrenal Glands
8 Testes
9 Ovaries
Explanation: are correct
Answer:
1 Pineal gland
2 Hypothalamus
3 Pituitary Gland
4 Thyroid Gland
5 Thymus
6 Pancreas
7 Adrenal Glands
8 Testes
9 Ovaries
Explanation:
Help, please! 10Pts.
Answers
Answer: see attatched file
why is heat shock important in bacterial transformation?
Answers
Heat shock is an essential step in bacterial transformation that involves exposing the bacterial cells to a sudden and brief increase in temperature.
This process is crucial because it temporarily disrupts the cell membrane and allows the uptake of foreign DNA, such as plasmids, into the bacterial cells. The heat shock causes the bacterial cells to become more permeable, and the foreign DNA can enter the cells more easily. Once the DNA has entered the cells, the heat shock is stopped, and the cells are allowed to recover and express the new genetic material.
Heat shock is vital in bacterial transformation because it ensures that the foreign DNA is taken up effectively, resulting in successful transformation.
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Hello this is for the hardy Weinberg problems , I need help with the conclusion questions
Answers
A population is in Hardy-Weinberg equilibrium if the genotype frequencies of the population are equal to the expected frequencies of the next generation, that is, if:
\(\begin{gathered} P=p^2 \\ H=2pq \\ Q=q^2 \end{gathered}\)The frequencies of the population are:
P= f(SS)= 0.9025
H= f(Ss)= 0.095
Q= f(ss)= 0.0025
The population of frogs has 8000 individuals, 20 of which are homozygous recessive for the trait "being spotted"
Assuming Hardy-Weinberg equilibrium you can calculate the frequency of the recessive allele as follows:
The genotypic frequency of the homozygous recessive is
\(Q=q^2=\frac{20}{8000}\)Apply the square root to determine the value of q:
\(\begin{gathered} q=\sqrt[]{\frac{20}{8000}} \\ q=\frac{1}{20} \\ q=0.05 \end{gathered}\)The allelic frequencies are complementary, which means that they add up to 1, knowing the value of q you can calculate the frequency of the dominant allele p:
\(\begin{gathered} p+q=1 \\ p=1-q \\ p=1-0.05 \\ p=0.95 \end{gathered}\)Predict the genotype frequencies of the offspring on equilibrium:
Homozygous dominant SS
\(\begin{gathered} P=p^2 \\ P=0.95^2 \\ P=0.9025 \end{gathered}\)Heterozygous Ss
\(\begin{gathered} H=2pq \\ H=2\cdot0.95\cdot0.05 \\ H=0.095 \end{gathered}\)Homozygous recessive:
\(\begin{gathered} Q=q^2 \\ Q=0.05^2 \\ Q=0.0025 \end{gathered}\)Compare the results:
As you can see the genotype frequencies of the current population are equal to the genotype frequencies of the original population, you can say that the population is in Hardy-Weinberg equilibrium.
Once the population reaches equilibrium it does not change, i.e. the frequencies are the same from one generation to the other, unless some outer factors, like deforestation, create a drastic change in the genetic pool (for example, by eliminating/ adding individuals or isolating small portions of the population)
On the other hand, if the population is evolving, i.e. the genotypic frequencies are changing, and the observed genotype and allele frequencies will change from one generation to the next one.
If you concluded that the population is in equilibrium, then it is not possible for it to be evolving as the frequencies do not change for a population in equilibrium as they do when the population is evolving.
This means that the population is not evolving.
through _____ large molecules are formed
Answers
Biological macromolecules
Hope this helps!
Answer:
Macromolecules
Explanation:
because they combine with covalent bonds
an epitope associates with which part of an antibody? the tail the heavy-chain constant regions only variable regions of a heavy chain and light chain combined the disulfide bridge the light-chain constant regions only
Answers
An epitope, also known as an antigenic determinant, is a specific region on the surface of a protein or other macromolecule that is recognized by an antibody. The part of the antibody that associates with the epitope is the variable region, which is found on both the heavy and light chains of the antibody.
The variable region is responsible for the specificity of the antibody, as it can bind to a particular epitope with high affinity. The constant regions of the heavy and light chains are responsible for other functions of the antibody, such as effector functions and determining the class of the antibody.
Therefore, the answer to the question is that the variable regions of both the heavy and light chains of an antibody combine to associate with an epitope. This allows for the specific recognition and binding of antigens by antibodies, which is critical for immune function.
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Answers
Energy is decreasing by 500 because some of it is turned into heat energy.
Explanation:
when an animal/creature consumes another living thing and or something that has energy it is decrease to a certain amount because some of the energy that the original animal/creature had is turned into heat energy because they use some of the energy for themselves to survive and live.
For example:
A flower is a producer because it produces energy and gets it gets eaten by a deer and some energy gets changed to heat and the other is consumed by the consumer (the deer) and so on.
which statement best describes what is occurring on the forest floor? responses primary succession is occurring because the ant is a new species changing the ecosystem. primary succession is occurring because the ant is a new species changing the ecosystem. secondary succession is occurring because the organisms on the forest floor are changing. secondary succession is occurring because the organisms on the forest floor are changing. climax vegetation is occurring because the seedlings finally have the chance to grow. climax vegetation is occurring because the seedlings finally have the chance to grow. primary succession is occurring because more plant life is healthier for the ecosystem.
Answers
Secondary succession is occurring because the organisms on the forest floor are changing. So the correct option is option B.
Secondary succession starts with bare soil. It’s similar to primary succession but the pioneer species are usually fast-growing and come from existing populations in the area.
Examples of secondary succession include forest regrowth after logging, forest regrowth after the fire, crop growth after harvest, tree growth after the hurricane, plant growth after the flood, and plant regrowth after a pest or disease.
Pioneer plants colonize bare soil, grasses take over, shrubs take over grasses, fast-growing trees take over, and slow-growing trees make up the climax community.
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Down syndrome occurs when an individual has a mutation of chromosome 21. In what organelle does this mutation occur? A)cell wall B)genes C)mitochondria D)Nucleus
Answers
Answer: B
Explanation: A chromosome is a long strand of DNA. Your DNA is the sequence that holds the "info" to make a gene.
What does stage 4 show?
A. A young female cone with fertilized eggs matures into a seed
cone.
B. A spore divides and grows into a pollen grain using mitosis.
C. Young male cones produce spores using meiosis.
D. A seed that contains an embryo plant grows into a young pine
tree.
Answers
Answer:
A.
Explanation:
It looks like the pine cone looks like is turning into a normal cone. That is why.
Answer: A. it looks as if its matured from being a young cone
what would happen if someone with celiac disease ate a grilled cheese sandwich ? will give brainlist !
Answers
Answer:
If we are assuming the grilled cheese has gluten, then there care be a reaction. then causing weight loss, upset stomach. etc.
In a _____ circuit, the current is the same everywhere.
Answers
Answer:
A series circuit
Explanation:
In a series circuit, the current is the same everywhere.
Answer:
series circuit
Explanation: