Consider a recessive mutation that results in a complete loss of gene function. If heterozygous individuals (mutant/wild-type) are phenotypically wild-type, then the wild-type allele would be described as being __________. See Section 4.1 (Page 107) .

Answers

Answer 1

Answer:

Answer:

dominant

Explanation:

In this example, if heterozygous individuals that carry one wild type allele and one mutant allele (mutant/wild-type) are phenotypically wild-type, then, the wild-type allele is dominant. This is explained by the fact that wild-type is expressed, even when mutant allele produces a non-functional gene.

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The process of natural selection is based on the assumption that:(1) environmental changes will cause changes in body structure in individuals
(2) most changes from generation to generation are the result of mutations
(3) part of the population of organisms always remains stable
(4) different traits inherited by offspring have different survival value

Answers

Answer:

Option B, most changes from generation to generation are the result of mutations

Explanation:

Through the process of evolution, an individual changes from one generation to other generation. These variations are caused by genetic changes.

Genetic variations are caused by -

a) Genetic mutation

b) genetic recombination

Genetic variation leads to alteration of gene or protein function due to which differences traits arises in an organisms. Thus , it can be said that genetic mutation brings variation in structure and thus leads to evolution of any species.

As long as generations of individuals with the newly developed trait continues to mate and reproduce, new trait becomes common in a population.

Hence, option B is correct

4 God I hate how they make u do 20 characters

Which statement best describes the role of gene expression in cells?Question 1 options:

Cells destroy the DNA of genes that they do not use.

When cells divide in mitosis, they pass on only the genes that are required.

To become specialized, cells need to control the production of proteins coded for in their DNA.

All genetic information in a cell's DNA is fully expressed at all times.

Answers

The answer is To become specialized, cells need to control the production of proteins coded for in their DNA.

All genetic information in a cell's DNA is not fully expressed at all times. On the contrary, in different cell lines, different DNA segments are expressed at different times. Some genes are active in unspecialized cells and later deactivate, some are activated only in specialized cells, for example. These are facultative genes which are active when needed, unlike constitutive genes which are expressed continually. Therefore, to become specialized, cells need to control the production of proteins coded for in their DNA. DNA segments, however, remain in cell and are not destroyed. Also, during the mitosis, all genes are passed, not only required genes.

Answer:

To become specialized, cells need to control the production of proteins coded for in their DNA.

Explanation:

Which of the following is NOT a characteristic that all living things share? A) a cellular organization B) using energy C) movement D) reproduction

Answers

The characteristics that is not shared in all living things is movement. The correct option is C.

While it is a property frequently linked to a variety of living things, not all living creatures have the ability to move.

There are many examples of living things that move very little or not at all over the course of their existence. For instance, plants are living things that often move very little or stay planted in one location. It's possible for microorganisms like bacteria or fungi to move very little.

However, all livingbeings also share the other traits listed in the choices.

All living things are formed of cells, which serve as the basic structural and functional units of life. This is referred to as a cellular organisation.

Thus, the correct option is C.

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A cellular organization is the characteristics that not all living things share. This is because most of the unicellular organisms don’t have cellular organization.

The part of cell and how these individual parts are arranged within the cell makes up the cellular organization.

Further Explanation

Cell is the basic unit of life and it has two types.

Prokaryotic cells (bacteria)
Eukaryotic cells (protozoa, fungi, plants, animals, algae)

Prokaryotic cells are cells with smaller sizes with a greater surface to volume ratio, which implies that nutrients can get to any part within the cell interior easily. Prokaryotic cells does not have nucleus. They are unicellular (single cell organisms) and they include bacteria and archaea. However, archaea lives in environments that are extreme.

Eukaryotic cells are cells with larger sizes, which means lesser-surface to volume ration and there is no easy or rapid diffuse of nutrients. In eukaryotic cells, a specialized internal organelles put together in an organized manner is required to metabolism to take place, to generate energy and moves chemical within the cell. Eukaryotic also refers to organism that has eukaryotic cell. Cells shapes and sizes vary.

The Basic cellular components of cells include:

Plasma membrane: refers to the cell membrane that separate the cell inferior from its surrounding environment. It is made up of proteins, carbohydrates and phospholipid bilayer.
Cytoplasm: it includes all the components within the plasma apart from the nucleus.
DNA: called deoxyribonucleic acid. It is the genetic material. Eukaryotic cells have many DNA molecules. They are located in the nucleus and mitochondria. A prokaryotic cell has a single DNA molecule and it has no boundary with the cytoplasm.
Ribosomes: it refers to the sites where proteins are synthesized.

KEYWORDS:

cellular organization
characteristics of living things
cells
Prokaryotic cells
Eukaryotic cells

_____ phase is a period in the life of the cell when it is conducting cell division. M phase
G1 phase
G2 phase
S phase

Answers

The question is asking for the term that is used to describe the phase in the life of the cell when cell division is taking place. The correct option is M phase [mitotic stage], that is, option A. In eukaryotic cells, the phases of the cell cycle are divided into two major phases, which are interphase and mitotic stage. During the mitotic stage, cell divides its DNA and cytoplasm into two equal parts, thereby forming two daughter cells.

Answer:

The correct option is M phase

Explanation:

Grass obtains 10% of the energy of the Sun. When a mouse eats the grass, it gets only _____ of the Sun's energy while _____ is lost as heat.

Answers

Grass only obtains 10% of the energy of the Sun. When a mouse eats the grass, it only gets 1% of the energy of the sun, while the remaining 9% is lost as heat. Remember, an average of 10% of the sun’s energy is transferred, in each link of the food chain. So, the answer would be 1% of the sun energy.

Why is an angioplasty an incorrect treatment for an aneurysm?

Answers

Angioplasty is the technique of mechanically widening narrowed or obstructed arteries. This is the process of putting a balloon in your arteries to widen it for blood flow. So Angioplasty would not be the best way to treat an aneurysm because an aneurysm is a bubble full of blood. Angioplasty would not work.

An angioplasty may rupture the blood vessel wall.

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Consider the following prairie food chain. Tall grass is consumed by grasshoppers that, in turn, are eaten by mice, and the mice are eaten by prairie kingsnakes. Red-tailed hawks prey on mice and prairie kingsnakes. When a red-tailed hawk dies, bacteria, beetles, fungi, and many types of worms help break down the body. Which of the following correctly identifies a trophic level in this ecosystem? View Available Hint(s) A. The tall grass is a decomposer B. The red-tailed hawk is a secondary consumer. C. The worms are primary producers. D. Grasshoppers are primary consumers.

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