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3 years ago

PLEASE HELP ME!!! 30 points (also marked Brainlest)

Biology

1 answer:

erica [24]3 years ago

7 0

Answer:

Explanation:

2-They live in burrows that they dig into the soil. This helps

aerate the soil and improve plant growth.

Crab feeding and burrowing mixes nutrients into the soil,

which is also good for plants. (important)

Fiddler crabs also promote marsh

plant growth that is important for the protection of coastal

cities from hurricanes.

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What are even distribution of solute and solvents

sergeinik [125]

Diffusion? are you asking what its called?

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3 years ago

If chemical bonds did not exist, or were so strong that they never broke apart, there would be no movement of ______, which is r

ch4aika [34]

Answer: Energy

Explanation:

If there is no chemical bonds in the substance or the bonds in the substances are so strong so there would be no energy released.

This is because there is a need of energy when any bond is formed and energy is released when bonds are broken down.

Energy is stored in the bonds which is released when bonds are broken down.

There would be no energy available for various processes and no movement of energy will take place.

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3 years ago

A prospective groom, who is healthy, has a sister with cystic fibrosis (CF), an autosomal recessive disease. Their parents are n

son4ous [18]

Answer:

Explanation:

From the given information:

Since the parent are normal; Let assume that their trait is Pp

The affected sister will be recessive in nature, so the trait will be pp

Now, the husband who is the groom will be a carrier with a probability of 2/3 since her sister is affected.

Also, the wife will be carrying a heterozygous trait since she is normal as well.

However, using Hardy-Weinberg assumption:

$q^2 = \dfrac{1}{2500}= 0.0004$

$q = \sqrt{0.0004}$

q = 0.02

Recall that:

$p+q =1 \\ p = 1 - q \\p = 1 - 0.02 \\p = 0.98\\$

Thus, $p^2 = (0.98)^2$

$p^2 = 0.9604$

$2pq = 2 \times 0.98 \times 0.022$

2pq = 0.0392

Finally, the required probability that there will be an affected offspring amongst the family is:

$= \dfrac{1}{4} \times \dfrac{2}{3} \times 0.0392$

$= \dfrac{1}{153}$

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3 years ago

What phase of mitosis is shown?<br>

gogolik [260]

Answer:

During mitosis, the two sister chromatids that make up each chromosome separate from each other and move to opposite poles of the cell.

Explanation:

i took notes from last quiz

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3 years ago

One of the ways that food can be preserved is by heavily salting it so that bacteria cannot live upon the food. What causes the

Andreas93 [3]

Answer:

d. salt moves in by osmosis

Explanation:

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3 years ago