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3 years ago

Cholera develops when the bacterial toxin

1 answer:

7 0

Cholera develops when the bacterial toxin prevents G-protein inactivation , which leads to the continuous production of cAMP.

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You are an almond grower and want to determine whether almond size (measured as shelled almond weight) is a heritable trait. A s

inn [45]

Answer: 1. S = 0.77

2. R = 0.14

Explanation:

1. Selection differential is the difference between the population mean and the average of the selected parents. Its symbol is S.

S = mean of selected parents - population mean

S = 6.48 - 5.71

S = 0.77

2. Response to Selection is how much gain you make when crossing over selected parents. Its symbol is R.

R = mean of offspring of selected parents - population mean

R = 5.85 - 5.71

R = 0.14

3. Heritability is, basically, a statistical variable that shows how much the variation in a trait is due to genetic factors. Its symbol is h².

To calculate it, use Breeder's Equation:

R = h²S

$h^{2}=\frac{R}{S}$

$h^{2}=\frac{0.14}{0.77}$

h² = 0.18

4. You would expect the production to be strongly influenced by environment, because heritability lies between 0 and 1. Low heritability means there is low level of resemblance between offspring and parents. As this program heritability is low, the resemblance is small, which means the characteristics are influenced mostly by the enviroment.

7 0

2 years ago

Angiotensin-converting enzyme (ACE) inhibitors and other vasodilators are used in the early treatment of heart failure. They act

Iteru [2.4K]

Answer:

Option c. cause pooling of the blood and decreased venous return to the heart

Explanation:

The ACE inhibitors increases the diameter of the blood vessels (vasodilation) that improves the flow of blood. This reduces the work load on the heart. At the time of heart failure, a substance called angiotensin is released. This angiotensin formation is blocked by the ACE inhibitors. Angiotensin is involved in narrowing the blood vessels.

The ACE cause pooling of the blood and decreased venous return to the heart. The ACE inhibitors causes vasodilation that allows decrease in blood pressure. So, there is no increase in arterial pressure, aldosterone and loss of volume. Thus, option C is correct.

3 0

3 years ago

Meiosis produces _____ daughter cells. 1 2 3 4

bulgar [2K]

4 daughter cells

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5 0

2 years ago

Read 2 more answers

Which describes an interaction within the musculoskeletal system?

inessss [21]

When a muscle contracts, a bone will move. When a bone contracts, a muscle will move. ... When a ligament contracts, a tendon will move.

4 0

2 years ago

Read 2 more answers

HELP ASAP!! DUE TOMORROW!! 9. Describe the major properties of water.

Black_prince [1.1K]

1. Attraction for other polar molecules.
2. Stores heat, High specific heat!
3. Stores hear, High heat of Vaporization
4. Low density of Ice
5. HIGH POLARITY!
6. Water has high surface tension
7. Water has the ability to carry ELECTRIC current
8. Is a UNIVERSAL solvent= has the ability to dissolve so many substances
9. Water occurs naturally on earth in three forms; solid, liquid, and gas.

8 0

3 years ago