Selective breeding happens

Answer: It is when the population growth rates are regulated by density of a population. This is important in a multicellular organism for several reasons. It would affect the birth and death rates of the organism.

Explanation:

Density dependence refers to the dependence of population growth on density. Natality and mortality rates depend on the number of individuals. The concept is closely related to competition between individuals for resources.

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The concept is related to the logistic growth model.

Populations that express a logistic growth model are mostly composed of multicellular organisms.

Population growth depends on density. Natality and mortality depend on the population size, meaning that there is no independence between population growth and population density.

When a population grows in a limited space, density rises gradually and eventually affects the multiplication rate.

The population per capita growth rate decreases as population size increases.

While growing, the population reaches a maximum point delimited by available resources, such as food or space. This point is known as the carrying capacity, K.

K is a constant that equals population size at the equilibrium point, in which the natality and the mortality rate get equal to each other.

Assuming that population size is N, when

Usually a sigmoid curve represents the logistic growth model.

So what does it mean?

That the natality and moratality rate depends on the number of individuals in the population.

As the population grow, the number of individuals increases, and competition for resources increases.

When the population reaches the critical point of being equal to carrying capacity, means that the environment can not support more individuals.

There are not enough resources for all of them, and competition increases affecting the reproductive rate and population growth.

So after this point, the population size decreases.

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In this experiment, the fourth tomato plants—the group of tomatoes that do not get any fertilizers—serves as the control group.

Fertilizer is any substance, whether chemical or natural, applied to the soil with the intention of boosting productivity. Tomato groups behave as a reference group when fertilizer is added, whereas tomato groups that have no fertilizer added behave as a control group. The aforementioned description is true as a result. The group in which nothing is altered is known as the control group. To determine whether the changes you make in the experimental groups actually had an impact, use this as a foundation or baseline. In the absence of this, your experiment is worthless since there is no evidence that the adjustment you performed was the root cause of the result you observed.

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Answer:

It has different kinds of wildlife

Explanation:

Answer: D. no natural selection

Explanation:

Fitness refers to the passing down of genetic make up based on the environmental requirements for reproduction and survival.

Answer choice A is incorrect, as large population, refers to the fact the more individuals in the population, the smaller effect of genetic drift. Genetic drift is a mechanism of evolution in which allele frequencies of a population change over generations due to chance (sampling error).

Answer choice B is incorrect, as random mating, refers to each individuals in a population have the same chance of passing on its alleles. An example of random mating includes: lions with darker fur color have the same chance to reproduce as lions with a lighter fur color.

Answer choice C is incorrect, as no mutations, refers to no changes to genes, new alleles are not introduced into the populations gene pool.

D is correct, no natural selection is when no phenotype can have a selective advantage over another - all individuals have equal fitness. And that correlates with the fitness being the same among all individuals in the population.

Answer: C

Explanation:

Gel-electrophoresis separate macromolecules according to their size and charge. In the exposed example, the well that contains a 17.15kb fragment but not a 2.03kb fragment is number 2 (Option B) (based on the attached image).

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Gel-electrophoresis is a technique widely used in labs to separate macromolecules, like DNA, RNA, and proteins.

This technique is based on the size and charge of the molecules. It expresses a pattern of differentiation according to the length of the fragments.

Once placed in the gel, molecules start their migration. Smaller molecules will travel faster and farther than the bigger ones.

So whenever we see a gel-electrophoresis result, we know that the largest fragments are placed in the first position, while the smallest ones are in the last position.

In the exposed example, we know that the smallest fragment is 2.03kb, while the largest one is 17.15kb.

We assume that largest fragment will be placed in the first position, and the smallest one will be placed in the last position.

We need to find a well that has fragments of 17.15 kb but not fragments of 2.03 kb.

So let us find the well in which there are molecules in the first position but not in the last one.

Note: In the attached files, you will find a gel-electrophoresis result image on which I base my answer. If this image is different from yours, choose the correct well in your gel-electrophoresis following the same reasoning.

The correct well is Two (Option B). Molecules have migrated to the first position but not to the last one.

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For an organism that has 18 chromosomes in its body cells and its sex cells have 9 chromosomes, the correct statement is C, Its sex cells are haploid and a result of meiosis.

Haploid cells have half the number of chromosomes as diploid cells. Mitosis is a type of cell division that produces two identical daughter cells. Meiosis is a type of cell division that produces four daughter cells, each with half the number of chromosomes as the parent cell.

In the organism described, the body cells are diploid (18 chromosomes) and the sex cells are haploid (9 chromosomes). This is because the sex cells are produced by meiosis, which is a type of cell division that reduces the number of chromosomes by half. This allows the sex cells to combine with each other to form a new diploid cell, which is the beginning of a new organism.

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Complete question:

An organism has 18 chromosomes in its body cells. Its sex cells have 9 chromosomes.

Which statement correctly explains this?

Its body cells are haploid and a result of mitosis.

Its sex cells are diploid and a result of mitosis.

Its sex cells are haploid and a result of meiosis.

Its body cells are diploid and a result of meiosis.

The capillaries are adapted to their functions because their walls are just a cell thick making it possible for exchange to occur.

A capillary is defined as the type of blood vessels that is found all over the body which is the smallest type of blood that allows the transport of blood, nutrients and oxygen to cells in organs and body systems.

The physiological structure of the capillaries helps in the adaptation of their functions because they are just a cell thick which is not so for veins and arteries of the vascular system.

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Answer:

Uh...... Sorry, is this a true of false question or something?

The visible light spectrum. Redshift and blueshift describe how light shifts toward shorter or longer wavelengths as objects in space (such as stars or galaxies) move closer or farther away from us. ... When an object moves away from us, the light is shifted to the red end of the spectrum, as its wavelengths get longer.

Answer:

B

Explanation:

There are several reasons why human lung capacities may not be equal. Some of these reasons include:

 Genetics: Lung capacity can be influenced by genetics, as lung size and shape are partially determined by genes.

 Gender: Men generally have larger lung capacities than women due to differences in body size and muscle mass.

 Age: Lung capacity tends to decrease with age, as the lungs become less elastic and lose some of their ability to expand.

 Lifestyle: Smoking, pollution exposure, and other lifestyle factors can damage the lungs and decrease lung capacity.

 Disease: Certain lung diseases, such as asthma, emphysema, and chronic bronchitis, can reduce lung capacity.

It's worth noting that while human lung capacities may not be equal, healthy lungs can still provide adequate oxygen to the body. It's important to maintain good lung health through regular exercise, avoiding harmful substances, and seeking medical attention for respiratory problems.

Answer:

One organism is benefited, other is affected.

Explanation:

An interaction between two species known as parasitism occurs when the parasite benefits while the host suffers. An illustration of this connection in which the parasites benefit is represented by the ticks and lice (parasites) that live on people (as they derive nourishment by feeding on the blood of humans). However, these parasites injure the human body and decrease host fitness.

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Prey animals are often smaller than their predators and have less physical strength, speed and defenses than the predators. Therefore, prey animals have to rely on various adaptive features to avoid being detected by predators. One successful way to avoid predation is to not be seen, and a prominent adaptation that helps prey not be seen is (A) camouflage.

Camouflage is a widespread defense mechanism among animals, wherein an organism blends with the surroundings to remain unseen by predators. There are various forms of camouflage that animals use to avoid being detected by predators. One of the most common forms of camouflage is coloration, wherein an animal has a color or pattern that resembles its environment.

The color of the fur, scales, or feathers of an animal that matches its background help it blend in with its surroundings and avoid being detected by predators. An example of this is the Arctic hare, whose white fur helps it blend in with the snow, making it difficult for predators like foxes to detect it.Another form of camouflage is shape and texture. Many animals have features that resemble the environment they inhabit.

For instance, some insects resemble leaves or twigs, while some fish have markings that make them blend in with their surroundings. An example of this is the stick insect, which looks like a twig, and the chameleon, which can change its color and pattern to blend in with its environment.

In conclusion, camouflage is a crucial adaptation that prey animals use to avoid detection by predators. Through coloration, shape, and texture, animals can blend in with their surroundings, making them invisible to predators and increasing their chances of survival. The correct answer is A.

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Answer:

Approximately 28 minutes.

Explanation:

Given:

Length of a duplex molecule of DNA = 10 mb

= 10 * 10^6 bases

So, it means each DNA has = 5 * 10^6 base pair

rate of DNA synthesis = 1500 nucleotide pairs per sec.

location of replication = at the middle which is 5 * 10^6/2

= At 2.5 * 10^6

solution:

As we know replication of DNA is a bidirectional process so it will synthesize in both directions and the rate is given is 1500 nucleotide per sec so the time required to replicate 2.5 * 10^6 in both directions will be from the formula

time = distane/rate

= 2.5 * 10^6/1500

= 1666.66 seconds

or, 28 minutes aprrox (27.77)

Answer:

Explanation:

The student is incorrect. During meiosis, homologous chromosomes pair up and can undergo crossing over, where genetic material can be exchanged between maternal and paternal chromosomes. This results in the formation of genetically unique haploid cells (gametes) with a combination of chromosomes from both maternal and paternal origin.

In the case of a diploid organism with 19 homologous pairs, the total possible combinations of maternal and paternal chromosomes in the gametes is 2^19, or approximately 524,000. This means that there are a large number of possible combinations of chromosomes that can end up in a gamete, making it unlikely for all of the chromosomes in a gamete to come from either maternal or paternal origin.

Therefore, the correct statement is that only a small fraction of the gametes produced by meiosis in this animal will have all of its chromosomes from either maternal or paternal origin, while the majority of the gametes will have a combination of chromosomes from both maternal and paternal origin.

Answer: (Note: You will find the image as an attached file)

Gallbladder.

Explanation:

The gallbladder is an organ located under the liver that intervenes in food assimilation by the organism. Its main function is to store bile - a liquid produced by the liver to dissolve fats -. The liver produces bile and it reaches the gallbladder through the hepatic and cystic ducts, and it is stored in the gallbladder until it is needed. Whenever the stomach or intestine are digesting food, the gallbladder release the bile which flows through the cystic duct and the bile duct to the thin intestine. In fact, the secretion of bile by this organ is stimulated by food ingestion, especially by the ingestion of meat or fats.

Answer:

B, C, D

Explanation:

Generally, females and males have the same hormones (i.e., estrogens, progesterone, and testosterone), but their production sites, their blood concentrations, and their interactions with different organs, systems, and apparatus are different [29

Answer:

progesterone

Explanation:

yeah. hbxhdbxhbsxhjvsshkxvxhkv khdsvxkhsxv jhsxv hjxsv jbxd nb. xskb vxskh bhkdsb

Answer: D. A bacterial plasmid with a target gene inside it best describes Recombinant DNA.

Explanation: Recombinant DNA is formed by inserting a target gene of interest into a plasmid, which is a circular piece of DNA that can replicate independently in a bacterial cell. This results in a bacterial plasmid with the target gene inside it. The recombinant DNA can then be used for various purposes such as producing proteins, testing gene function, and more.

Answer:

Both a human and rodent skeleton have skulls, but they aren't much alike. Both the human and rodent skeleton need calcium to keep their bones strong. Both a human and rodent skeleton have 24 ribs, these are used to protect vital organs.

The genetic disorder that the scientists are most likely studying is an autosomal recessive disorder.

In this type of disorder, a person needs to inherit two copies of the mutated gene, one from each parent, to develop the disorder. When both parents are carriers of a recessive gene mutation, there is a 25% chance that each of their children will inherit two copies of the mutated gene, and therefore develop the disorder.

However, if only one parent is a carrier, the children will inherit one copy of the normal gene from that parent and one copy of the mutated gene from the other parent, and therefore will not develop the disorder.

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Answer:

OPTION b. "The 3D shape of a protein is determined largely by the ribosome forming the protein" is NOT an accurate description of protein synthesis and folding.

Explanation:

a. Many copies of a protein can be synthesized simultaneously from the same mRNA.  TRUE. As a ribosome moves along the mRNA chain synthesizing a new protein, another ribosome might follow it, synthesizing another protein from the same mRNA chain. And so on. So, at the same time, many ribosomes might be attached to the mRNA, synthesizing many copies of the protein, but at different development levels. The mRNA chain together with many ribosomes is called a polyribosome.

b. The 3D shape of a protein is determined largely by the ribosome forming the protein.  FALSE. What determined the 3D structure of the protein is the amino acid sequence of that particular polypeptide. Each amino-acid has different properties (hydrophobic, hydrophilic, positively charged, negatively charged) and they interact with each other by different bonds that depend on those poperties. So the amino acids composing the proteins and their interaction, is what models the structure of the protein.

c. The entire chain of amino acid exits the ribosome before it begins folding into its 3D shape.  TRUE. When the ribosome reaches the end codon, the elongation process has finished, and the new protein leaves the ribosome and is translocated to the RER lumen where it is going to get folded.

d. The first encoded amino acid in every protein is methionine. TRUE. Almost always, the first amino acid located by the tRNA is the methionine, codified by the initiation codon AUG. This amino acid is frequently eliminated at the end of the process.

Answer and Explanation: Growth can be classified into two categories in living organisms. It is vegetative and reproductive growth.

Biologically, other than growing in size, any organism will show reproductive growth. Be it a plant, animal, fungus, or any other microorganism, all of them show reproductive growth.

In the biological world, there are four main types of reproductive growth. They are vegetative reproduction, asexual reproduction, sexual reproduction, and parthenogenesis. Like size growth, reproductive growth can also be logarithmic, or exponential.

Hence, reproductive growth is another very important form of growth other than the size of the body. Reproduction ensures the continuity of the generation and maintenance of species. Reproductive growth also helps to bring in genetic variation and ensure survival due to mutation.

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Answer: it is going to be D

Explanation:

I was doing a test and I got it right

Answer:

What impact do the available amounts of energy, water, and oxygen have on an ecosystem? They act as limiting factors. ... increasing the biodiversity of the ecosystem.

Answer:

when anamial eats a plant it gains the oxygen from the plant and it can be transformed into energy

Explanation:

Have a good day please mark as branliest

Answer:

A

Explanation:

The same as eggs being produced in the ovaries in a female, the balls of a male are like ovaries which produces the sperm in men.

Answer:

Images

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1-Water is passively transported into the roots and then into the xylem. 2-The forces of cohesion and adhesion cause the water molecules to form a column in the xylem. 3- Water moves from the xylem into the mesophyll cells, evaporates from their surfaces and leaves the plant by diffusion through the stomata.

Human beings are omnivores.

Hence, human dentition and length of the digestive tract are examples that suggest that humans are adapted to have an omnivorous diet.

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Both males and females can experience reproductive system disorders. These disorders can be caused by genetic factors, hormonal imbalances, structural issues, infections, or other medical conditions. In males, these disorders may include erectile dysfunction, infertility, testicular disorders, prostate problems, and hormonal imbalances. In females, they may include menstrual disorders, polycystic ovary syndrome, endometriosis, uterine fibroids, ovarian cysts, infertility, and hormonal imbalances. Treatment options vary depending on the specific disorder and may involve medication, hormonal therapy, surgery, or assisted reproductive technologies.