Which of the following describes a negative Feedback loop? A) When the heart rate is too high the body since hormones that continually increase the heart rate higher B)When a pregnant woman is a labor in the body since hormones that increase the intensity of contractions which then increases the secretion of the same hormones C)When blood sugar is too low the body since hormones that raise blood sugar until it reaches a typical level and hormone secretion slows D)When a person is jogging the body since four months to continually do you kris the rate of oxygen supply to the legs

Answers

Answer 1

Answer:

Answer:

its c : When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows.

Explanation:

Answer 2

Answer:

A) Positive feedback loop

B) Positive feedback loop

C) Negative feeback loop

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Small, uncharged substances enter and leave the cell membrane through the process of

Answers

small, uncharged substance enter and leave the cell membrane through the process of : Simple diffusion When a substance enter pass your cell membrane, it will filter up the uneeded substance to be excreted out from your body and letting the one that needed in by leveraging the thickness of the substances concentration

Answer:

Simple diffusion is the process by which some atoms and molecules move directly across the cell membrane from an area of high concentration to an area of low concentration.

A neighborhood group wants to build a new playground using donations from residents. The amount needed from each donor varies inversely to the number of people donating. If 25 people donate, each of them would need to contribute $135. Solve for the amount each person needs to contribute if 45 people donate.

Answers

First of all, we need to find out how much money is needed ,

25 x $ 135 = $ 3375

Next, we just need to divide this amount to total contributors

$ 3375 / 45 = $ 75 per person

Hope this helps

Answer:

Each person needs to contribute is $75.

Step by step explanation:

It is given that the number of people is 25. Each of them would need to contribute $135.

Total amount contributed by 25 people is the product of 25 and 135.

$25* 135=3375$

Total amount contributed by 25 people is $3375.

Now 45 people has to contribute the same amount $3375.

If 45 people donate $3375, then each people donate

$(3375)/(45)=75$

Therefore, each person needs to contribute is $75.

Describe how the changing species concept has affected classification systems

Answers

The changing species concept has affected classification systems by distinguishing one species from the other. It has the effect of making to appear that species and their distinctive attributes are external and fixed. The reason for that because o the evolutionary process they have undergone.

Corn oil has a density of 0.7 g/cm3. Water has a density of 1.0 g/cm3. A piece of plastic with a density of 0.9 g/cm3 will _____.sink in corn oil and in water

sink in corn oil and float to the top of water

float in corn oil and in water

sink in corn oil and float in the middle of water

Answers

Answer:

Corn oil has a density of 0.7 g/cm3. Water has a density of 1.0 g/cm3. A piece of plastic with a density of 0.9 g/cm3 will sink in corn oil and float to the top of the water.

Explanation:

Density is a unit that let us know the quantity of mass that a substance has per unit of volume. In a solution, the component with lower density will float, and be on the surface.

If we compare the densities of corn oil and a piece of plastic, the plastic will sink because its density ( 0.9 g/cm³ )is higher than the one of the corn oil (0.7 g/cm³).

In the case of the water, the plastic will float to the top because its density ( 0.9 g/cm³) is lower than the one of water (1.0 g/cm³).

You can usually tell the difference between a caldera and crater by studying _____.

Answers

A crater is the top of a volcano's central vent and is funnel shaped. A caldera is a magma chamber that supplies materials to the volcano and eventually collapses when there's nothing more to supply.

Nucleotides are the basic unit of which macromolecules?

Answers

Answer:

Nucleic acid

Explanation:

Nucleotides are the basic unit of Nucleic acid

A nucleotide consists of three groups –

a) 5-carbon sugar (ribose or deoxyribose)

b) a nitrogen-rich base - There are four nitrogen rich base namely cytosine (C), guanine (G), adenine (A), thymine (T)

c) and a phosphate group

The nucleotides are the repeating units of a nucleic acid and therefore a nucleic acid can be considered as polymer while a nucleotide becomes its monomer unit.

Nucleotides are the basic unit of the macromolecules, nucleic acid. Nucleic acids are the deoxyribonucleic acid (DNA) and the ribonucleic acid (RNA.) These nucleic acids are large biomolecules that are far as known, is responsible for all forms of life.

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