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3 years ago

What best explains the relationship between structure and function of the cell membrane?

1 answer:

4 0

The right option is; -the single layer membrane surrounding the outside of the cell allows for the easy removal of waste

The cell membrane is a biological membrane that surrounds a cell and separates the contents of the cell from its external environment. The cell membrane is composed of lipids and proteins and its main function is to protect the cell from its surroundings. The cell membrane also controls the molecules that enter and leave cell.

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Evolutionary theory contends that genetic ___________ is necessary and beneficial for humanity when there is an environmental ch

Anni [7]

Answer:

variation

Explanation:

Genetic variation is what makes us all unique as a result of subtle changes in our DNA. The Theory of Evolution is a process in which organisms change over time as a result of adapting to their environment. Charles Darwin came up with the term Survival of the fittest, in any environment plants and animals from the same species show natural variation in their physical characteristics, like neck lengths in giraffes. Darwin suggested that the plants and animals best suited to the environment will survive and pass on their characteristics to their offspring. Over time, the characteristics of the surviving members of the species will become predominant.

Example: Peppered moth

In London in the 1800's, 98% of peppered moths had light colored bodies and only 2% were dark. The light moths were the same color as the trees so they could easily hide from hungry birds and not get eaten. The dark moths however were easy to see and were eaten. Then came the factories and smoke of the industrial evolution and many trees turned black with soot and suddenly the dark moths were able to survive better as they now looked like the trees and the light colored moths were easier to spot and eat. By 1895 the dark peppered moths made up 95% of the population and the light colored moths only 5%. This is an example of natural selection, because of the gene that makes the moths dark, it allowed them to flourish when the environment changed, they adapted, reproduced and survived.

8 0

3 years ago

An 80-year-old client with a history of coronary artery disease is admitted to the hospital for observation after a fall. during

lara31 [8.8K]

Orthopneic

The client's paroxysmal dyspnea was probably caused by sleeping in bed with the legs at the level of the heart; this position increases venous return from dependent body areas, increasing the intravascular volume. Sitting up and leaning forward while keeping the legs dependent slows venous return as well as increases thoracic capacity. Although the contour position elevates the client's head, it does not place the legs in a dependent enough position to substantially decrease venous return. The recumbent position is contraindicated. Venous return increases when the lower extremities are at the level of the heart. Also, the pressure of the abdominal organs against the diaphragm decreases thoracic capacity. The Trendelenburg position is contraindicated. Venous return increases when the lower extremities are higher than the level of the heart. Also, the pressure of the abdominal organs against the diaphragm decreases thoracic capacity.

3 0

3 years ago

Glaucoma is a leading cause of blindness. Studies have linked a common form of glaucoma to three genes and more than 20 genetic

andrew11 [14]

It seems that you have missed the necessary options for this question, but anyway here is the answer. Glaucoma has been one of the leading causes of blindness and a common form has been linked to three genes and more that 20 genetic loci. So the statement that best describes glaucoma is that, <span>a polygenic trait that is influenced by the number of alleles present. Hope this answer helps.</span>

8 0

3 years ago

Which of the following typically characterizes a tropical forest?

antoniya [11.8K]

B. Mild weather and frequent rainfall.

3 0

3 years ago

Hello i need help on my last question this question is a bonus point to anyone who answer it

Tema [17]

Answer:

Explanation:

A: Venus rotates far more slowly than Earth

Look at the column that says Period of Rotation.

Venus has a rotation period of 243 days.

Earth has a rotation period of about 24 hours.

243 days is much longer than 24 hours, so this is true.

B: Venus's year is longer than Earth's.

The year is also another way to say Period of Revolution.

Venus's is about 224 days.

Earth's is about 365 days.

Venus's is actually shorter, so this is false.

C: Mercury is approximately twice the size of Earth.

Let's look at the Equatorial Diameter column.

Mercury's is 4,880 km.

Earth's is 12,756 km.

Mercury's is much smaller than Earth's, so this is false.

D: All of the above.

Since B and C are both not true, this is incorrect.

Therefore, the correct answer is A: Venus rotates far more slowly than Earth.

6 0

3 years ago

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