Answer:
single
Explanation:
A prokaryote is a simple, mostly single-celled (unicellular) organism that lacks a nucleus, or any other membrane-bound organelle. We will shortly come to see that this is significantly different in eukaryotes. Prokaryotic DNA is found in a central part of the cell: the nucleoid.
Which describes the first step in protein synthesis? A. DNA is transcribed to mRNAB. the DNA molecule unzips between the base pairsC. amino acids are linked in a long chainD. tRNA brings amino acids to the ribosome
The first step in protein synthesis is when the DNA is transcribed to mRNA.
What did people use for shelter in the paleolithic age? why were these shelters temporary?.
Paleolithic-era inhabitants had made their homes in caves or in spartan, tent-like shelters. Due to the hunter-gatherers' propensity to migrate in search of follow wild animals, these shelters were only temporary.
Early humans were hunters and gatherers who lived in caves, rudimentary houses, or tepees during the Paleolithic era (approximately 2.5 million years ago to 10 thousand B.C.). They hunted wild animals and birds using primitive stone axes and simple stone and bone tools.They most likely consumed vegetables and collected seeds, fruits, nuts, and other edible plant materials. As small animals were hunted later, meat is said to have been added to the diet. Eventually, people began to hunt huge animals. The first type of home was in the form of trees, providing people with only rudimentary protection from the sun, rain, and cold. It did, however, offer protection from animals that couldn't scale the tree. caves are still another kind of refuge.
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help pls. i’ll give u brainliest fr
Answer: Covalent Bond
Explanation:
When carbon atoms bond with each other, it makes a covalent bond.
All the statements are true of herbivores except that they are
often prey
not producers
primary consumers
sometimes predators
The "Sometimes predators" one.
Herbivores are plant eaters so that don't eat meat.
They can be prey like a deer to a wolf.
They produce alright baby deer.
They do consume plants.
Answer:
The answer is "Sometimes preadators".
Explanation:
Which statement about the water cycle is false? *
1 It naturally recycles water
2 It has a beginning and end
3 it is powered by the sun
4 It involves living things
Answer:
Option 2
Explanation:water cycle process never ends
The statement is false about the water cycle is It has a beginning and end. Option 2 is the answer for the water cycle, as it is cyclic process that happens in nature, so it has no beginning and no end.
What is the role and importance of the water cycle?The water cycle takes place in the ecosystem to maintain the water level, and it is done by different processes. The plants release water through transpiration and cellular activities, and this goes into the water cycle.
The sun plays an important role in this because, due to temperature differences, water evaporates from water bodies and is released into the environment . All this water goes and forms clouds at lower temperatures to form rain that falls on the earth, and in this way the water cycle continues with the help of living things (plants and animals), the sun, and the water recycling every time.
Hence the answer is option 2, which says it has a beginning and an ending.
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What are the gross anatomical characteristics of the vagina?
The vagina is an internal reproductive organ in females. It is a muscular canal that connects the external genitals to the uterus. Here are some gross anatomical characteristics of the vagina:
1. Location: The vagina is located between the urethra and the rectum in the pelvic region.
2. Size and Shape: The vagina is approximately 7 to 9 centimeters in length in adult women, although it can vary. It has a tubular shape and is capable of stretching to accommodate childbirth.
3. Walls: The vaginal walls are made up of smooth muscle tissue, which allows the vagina to contract and expand.
4. Rugae: The inner lining of the vagina contains folds called rugae. These rugae allow the vagina to expand during sexual arousal and childbirth.
5. Secretions: The vagina produces natural lubrication to facilitate sexual intercourse and maintain a healthy environment. The amount and consistency of vaginal secretions can vary depending on hormonal changes, menstrual cycle, and overall health.
These are the main gross anatomical characteristics of the vagina.
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Water is produced from the __ of oxygen A. Oxidation B. Reduction C. Fixation D. Combustion
Answer:
Combustion
Explanation:
"During combustion, oxygen is added to a molecule, which produces water in this reaction. Combustion also releases a lot of energy. "
"The general equation for a complete combustion reaction is: Fuel + O2 → CO2 + H2O."
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Won't let me add sources :')
Which description supports the claim wat mutations in gametes could cause an increase in genetic diversity in a population?
A. A deletion during meiosis results in a new version of an allele.
B. A drug creates a mutation in a liver cell. The mutated cell multiplies.
C. UV ravs create thymine dimers that negatively affect a skin cell's function.
D. A brain cell has a missense mutation that allows it to function more effectively.
A deletion during meiosis results in a new version of an allele, thus option A is correct.
What is mutation?A mutation is a change to an organism's DNA sequence.. Viral infection, exposure to mutagens, and errors in DNA replication during cell division can all result in mutations. Somatic mutations cannot be passed on to offspring, whereas germline mutations (those that happen in eggs and sperm) can.
Nearly none of the mutations that occur in our cells have any impact on how we feel. What we typically see in science fiction movies is very different from this. A mutation is never so advantageous in real life that it turns a person into a superhero or gives them wings. There are a number of explanations for why mutations rarely have negative consequences. Our cells have highly advanced machinery for quickly correcting mutations, which is one explanation.
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Scientists group organisms into three domains: Archaea, Bacteria
and Eukarya. In which domain are animals classified and why?
O Archaea, because animals live a long time.
O Bacteria, because animals are unicellular.
Bacteria, because animals make their own food.
Eukarya, because animal cells contain genetic information inside of
nuclei.
Answer:The answers is D
Explanation:I got a 100 on the test. Also if you look up what domain are animals it will tell you they are eukarya.
Two words you hear in science a lot are hypothesis and theory. What is the difference?
Group of answer choices
Theory is another word for fact; hypothesis is another word for guess.
Theories have been confirmed through tests; hypotheses have not been tested
Hypotheses cannot be proven; theories can
Theories may cover many hypotheses; a hypothesis contains only one theory
Answer:
Theories have been confirmed through tests; hypotheses have not been tested.
Explanation:
Theories have to be proven, whilst hypotheses is an experiment that is carried out without yet knowing the outcome.
State Newton's 2nd law of Motion:at sentence or 2 plz
The poles experience 6 months of daylight and 6 month of darnos . The sun is never higher than 23.5 degrees above the horizon . Use one or both of these ideas as evidence to explain why the season are most extreme at the poles
Answer:
North and South pole are cold as they do not receive direct sunlight. South pole is much colder than North pole. The Sun is always low on the horizon, even during summer and winters.
The Sun only comes up for a few months, that is why both nights and days are dark and cold.
The average mean temperature in summers at North pole is 32 degrees Fahrenheit and in winters its minus 40 degrees. While at south pole it is minus 18 degrees Fahrenheit and in winters it is minus 76 degrees Fahrenheit.
Which property refers to how a mineral reflects light? density hardness luster streak
Answer:
Luster is how a mineral reflects light.
Explanation:
Answer:
Luster is correct
Explanation:
Got it right on Edge
PLS HELP NEED IT FAST
Answer:
sunlight is essential for normal growth of pine trees
Explanation:
I think becuase photosyinthiesis needs sunlight to be able for the trees to grow
i hope this helps
The large number of cases of tuberculosis despite and effective treatment strategy suggest that complete control of an infectious disease depends on educating patients about _________.
Background: There is debate over the efficacy of directly observed therapy (DOT) for tuberculosis medication. The purpose of this comprehensive review was to synthesise data from studies comparing DOT and self-administered therapy (SAT) or various kinds of DOT for anti-tuberculosis medication.
Two independent evaluators examined multiple databases for pertinent randomised controlled trials (RCTs) and non-randomised studies. Two reviewers separately evaluated the risk of bias, and papers with a high risk of bias were excluded. One evaluator extracted the data, which was then double-checked by another. Cure and treatment effectiveness were the primary outcome metrics.
We included eight RCTs and 15 non-randomised studies, the majority of which were performed in low- and middle-income nations. There was no compelling proof that clinic DOT was superior than SAT.Both RCTs and non-randomised trials found that community DOT was more successful than SAT. Neighborhood DOT was as good as, if not better than, clinic DOT. The findings showed no statistically meaningful difference between family and non-family community DOT.
Conclusions: If community DOT by non-family members is more practical for patients and less expensive for health services than clinic DOT, it may be the best choice.
Earth rotates from ___ to ___ (direction N,E,S,W)
Earth rotates from west to east.
Respiration is a form of oxidation that causes what
Respiration is a form of oxidation that causes the electron donor to be oxidized and oxygen to be reduced.
What is Respiration?This is referred to as the movement of air or dissolved gases into and out of the lungs. It is also the process in which energy is produced from oxidation of organic substances through the intake of oxygen and the release of carbon dioxide.
In this scenario, the central organ of respiratory activities is referred to as the lungs and the electron donor is oxidized while the oxygen is reduced during the process thereby making it the correct choice.
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The female reproductive system in humans differs from the human male reproductive system in that only the female system is responsible for
A.
producing sex hormones.
B.
creating offspring.
C.
producing gametes.
D.
nourishing a developing zygote.
Answer:
nourishing a developing zygote.
Explanation:
study island
In humans, the female reproductive system differs from the male reproductive system because only it is responsible for: D. nourishing a developing zygote.
What is a zygote?A zygote can be defined as an eukaryotic cell that is typically formed by the fusion of two (2) haploid gametes in living organisms such as humans.
In humans, the female reproductive system is different from the male reproductive system because only the female reproductive system is responsible for nourishing a developing zygote within the uterus.
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HELP QUICK During photosynthesis, ______ is used to break water down into oxygen and hydrogen.
-A) oxygen
-B) glucose
-C) sunlight
-D) carbon dioxide
Answer: Oxygen
Explanation:
If the color of a particular dog species was controlled by one gene with two alleles in an incomplete dominance relationship, what color would you expect the offspring to be of a black female and white male dog?
The offspring produced from the cross between a black dog and a white dog is gray-colored offspring.
What is Incomplete dominance?Incomplete dominance is the phenomenon in which two true-breeding parents are crossed to produce an intermediate offspring or a heterozygous. Incomplete dominance is also referred to as partial dominance or intermediate inheritance.
Incomplete dominance occurs when neither of the trait is truly dominant over the other trait. This means that both of the traits can be expressed in the same regions of an organism, resulting a blending of two phenotypes. If a white and black dog are crossed to produce a gray offspring, then this is an example of incomplete dominance.
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If an organism's haploid number of chromosomes is 10, it's diploid number is
If an organism's haploid number of chromosomes is 10, its diploid number is 20.
What is a chromosome?
A chromosome is a thread-like structure found in the nucleus of cells that carries genetic information in the form of genes. Chromosomes are made up of DNA, which is a chemical compound that contains the instructions for the development and functioning of all living organisms.
In most organisms, chromosomes are arranged in pairs, with one chromosome of each pair inherited from each parent. The complete set of chromosomes in an organism is known as its genome. The genome of an organism contains all of the genetic information necessary for the organism to develop, grow, and function.
Chromosomes come in different sizes and shapes, and the number of chromosomes can vary among different species. For example, humans have 23 pairs of chromosomes, for a total of 46 chromosomes, while dogs have 39 pairs of chromosomes, for a total of 78 chromosomes. The number and arrangement of chromosomes can play a role in the characteristics and traits of an organism.
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When a atom gains or loses electrons , it has an electrical change. It is know as:
Answer:
please give me brainlist and follow
Explanation:
An atom that gains or loses an electron becomes an ion. If it gains a negative electron, it becomes a negative ion. If it loses an electron it becomes a positive ion (see page 10 for more on ions).
Sheryl is observing ovarian slides taken from a female ape. All the cells show crossover chromosomes. What is this stage?
A.
meiotic prophase I
B.
meiotic prophase II
C.
meiotic metaphase
The ovarian slides taken from the female ape will show crossover chromosomes in (A) meiotic prophase I.
Crossing over is the event that occurs during Prophase of Meiosis I. During this event, the exchange of genetic material occurs between two non-sister chromatids of two homologous chromosomes. This occurs to produce the recombinants having genotype different from both the parents.
Meiotic Prophase I is the longest and most complex phase of Meiosis. The phase is further divided into stages. These are: Leptotene. Zygotene. Pachytene, Diplotene and Diakinesis. Many of the crucial events of Meiosis like synapsis formation, recombination, etc. occur in this phase.
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Which best describes Active Transport?
A. Using energy, membrane proteins pick up particles and move them against the concentration gradient.
B. Without energy, particles move freely with the concentration gradient.
C. Using energy, glycoproteins pick up particles and move them against the concentration gradient.
D. Using energy, membrane proteins pick up particles and move them with the concentration gradient.
Mendelian inheritance does not apply to the inheritance of alleles that result in incomplete dominance and codominance.
Why? How are the alleles in these two situations different from the alleles that Mendel studied?
Answer:
Explanation:
Phenotypes that Mendel studied was controlled by one gene that had two possible alleles, dominant and recessive allele. This made it possible to see just one or the other phenotype (total of 2 phenotypes).
Well now we know that a characteristic may be controlled by one gene with two alleles, but the two alleles may not have a traditional relationship of dominant and recessive. Which is why we see the patterns like codominance and incomplete dominance.
Codominance is when both alleles are expressed equally in the phenotype of the heterozygote. For example, you have a black flower and red flower, a codominant flower would have both black petals and red petals. Do you see how the traditional relationship of one being dominant and other being recessive no longer holds because you express both alleles.
Incomplete dominance occurs when the phenotype of the offspring is somewhere in between the phenotype of both parents. SO a black and red flower would make an offspring with purple petals where neither of the alleles reigns supreme over other rather we get a mixture of both alleles.
The passing of the alleles from the parent to the offspring in a particular manner was given by Mendel, he defined the passing of the recessive and the dominant allele in a specific way from generations.
Mendelian inheritance does not apply to incomplete and co-dominance.
The exception of the Mendelian inheritance can be explained as:The condition in which the allele is not completely expressed in the progeny is called incomplete dominance while the expression of both the recessive and the dominant allele in the progeny together is called co-dominance.In the co-dominance case of hetero-zygotic phenotype, the allele is depicted equally. The law of recessive and dominance does not apply here and both the alleles are expressed in the progeny in equal ratio.In the incomplete dominance condition, the phenotypic character of the progeny is in the middle and a mixture of both the dominant and the recessive allele.Therefore, the Mendelian inheritance law does not apply to incomplete dominance and co-dominance.
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explain why variagated plants accumulate less food than non variegated plants under similar conditions
Explanation:
they have less chlorophyll in them. Thats the green stuff that turns sunlight into energy, via photosynthesis, so less 'green' means less ability to make food. As rate of chlorophyll in non-variegated leaf is more than that of variegated leaf,as more sunlight is trapped in case of non-variegated leaf
Which system of the human body controls body loss and regulates body temperature?
Answer:
Our internal body temperature is regulated by a part of our brain called the hypothalamus. The hypothalamus checks our current temperature and compares it with the normal temperature of about 37°C. If our temperature is too low, the hypothalamus makes sure that the body generates and maintains heat.
Explanation:
Answer:
hypothalamus
Explanation:
It is the main organ which guides other organs to maintain body temperature
Patients with a genetic condition known as cystic fibrosis struggle with symptoms such as lung and digestive problems. At the cellular level, the cells of patients with the disease do not transport water or other materials out of the cell efficiently. Therefore, patients’ cells have a build up of water and other substances inside the cell. Which of the following best describes how cystic fibrosis impacts cells?
Answer:
One pair of chromosomes includes a gene called the cystic fibrosis transmembrane conductance regulator (CFTR) gene. This gene is large and complex — in fact, more than 1,000 different CF-related mutations have been identified.
In most people, the CFTR gene helps regulate the flow of salt and fluid in and out of cells. But if there is a mutation in this gene, chloride, a component of salt, gets stuck inside the cells and a thick, sticky mucus starts to build up inside the body.
Explanation:
A student measured a plant’s growth when given various amounts of water. Which type of data was collected by the student?
Amount of rainfall can be measured with the help of
Answer:
Rain Gauge
Explanation: