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3 years ago

How do you think water and carbon dioxide used for photosynthesis get into the plant's leaf?

Biology

1 answer:

Leto [7]3 years ago

4 0

Answer:

The leaves of plants contain openings called stomata, which are used for the exchange of gases. Carbon dioxide, combined with water in photosynthesis, is drawn in through the stomata. Oxygen, a byproduct of the process, is released through these openings, along with water vapor in a process called transpiration.

Explanation:

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A scientist samples a population of butterflies and finds that 56% are heterozygous at a particular locus. If the population is

d1i1m1o1n [39]

0.44 the frequency of the homozygous individuals in this population.

What is Hardy-Weinberg principle ?

The Hardy-Weinberg equilibrium is a principle stating that the genetic variation in a population will remain constant from one generation to the next in the absence of disturbing factors.

From the Hardy Weinberg Law of Population and Genetics,

We have

x²+2xy+y²=1 and

x+y=1

where

x = frequency of the dominant allele in the population

y = frequency of the recessive allele in the population

x2 = percentage of homozygous dominant individuals

y2 = percentage of homozygous recessive individuals

2xy = percentage of heterozygous individuals

Given 2xy = 0.56

from here, y=0.28/x, (the frequency of the recessive allele ) can be obtained

we need to find 'x'

recall, x+y=1, x=1-y

substituting this gives us

y=0.28/(1-y), which becomes,

y(1-y)=0.28

y²- y + 0.28 (quadratic equation)

Solving this to find 'y' gives two imaginary values of y = 0.44 but ,

There is no imaginary solution .

Learn more about Hardy Weinberg Law of Population

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4 0

2 years ago

According to the pie chart, which cause results in the most extinctions?

Sophie [7]

<h3><u>Answer;</u></h3>

B.introduced species

<h3><u>Explanation;</u></h3>

<em><u>Animals become extinct for a number of reasons. Currently many animals are endangered or have become extinct due to human activities or human influence.</u></em>
Extinctions may be caused by reasons;<em><u> such as pollution; loss of habitat due to human activities such as agriculture, introduced species, hunting and poaching for meat and other animal products such as feathers, horns and skins, and also over-harvesting among other influences.</u></em>
In this question; <em><u>Introduced species occupies the largest percentage, that is 39%, from the pie chart (Attached).</u></em>
Hunting and poaching; 23 %, Habitat loss; 26%, and Others; 2%.

8 0

3 years ago

Read 2 more answers

The ability of muscle to shorten forcibly when adequately stimulated is known as ________

Andrej [43]

The ability of muscle to shorten forcibly when adequately stimulated is known as <u>contractility.</u>

Explanation:

Contractility is defined as the ability of muscle cells to contract forcefully to bring about movement in body organs.
The folding of arms are results of contractility of biceps and triceps.
Contractility of cardiac muscle to regulate pumping of heart is again a result of contractility of myocardial muscle.

5 0

3 years ago

Read 2 more answers

Where is the majority of the body's magnesium found?

marysya [2.9K]

Bones and muscle tissue

5 0

4 years ago

Why would scientists conduct investigations on a newly discovered alternative fuel?

klio [65]

Answer:

why would scientists conduct investigations on a newly discovered alternative fuel?

to confirm that the alternative fuel is cleaner than fuels currently used

Explanation:

As an alternative fuel, it must be validated whether it is better than the one currently in use

7 0

3 years ago