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Y_Kistochka [10]
3 years ago
9

A catalyst is a substance that does what?

Biology
1 answer:
inysia [295]3 years ago
5 0

The answer is C. A catalyst speeds up the rate of a chemical reaction. However, it is not consumed during the course of the day.

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Match these examples with the correct level of organization. Please hurry!!!
irina [24]

Answer:

Organ systems: human body and circulatory system

organs: heart

tissue: muscle

Explanation:

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3 years ago
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URGENT!!!
trapecia [35]

Answer: B

Explanation: The lizards are trying to adapt t the environment, therefore, it would be B.

I HOPE THIS HELPS!

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3 years ago
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Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). Only homozygous individu
White raven [17]

<span><u>The answer is A. 72.25 percent.</u>

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1</em> and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq </em>are the frequencies of the genotypes.

<span>The <em>r</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>R</em> allele frequency (<em>p</em>), the formula p + q = 1 is used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>R</em> allele (<em>p</em>), it is easy to determine the frequency of the RR genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

4 0
2 years ago
How does Earth’s tilt affect climate?
sergey [27]

bc the more the earth tilts the farther away that part of the earth gets from the sun so therefor its not goin to be as hot over there

4 0
3 years ago
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Lead poisoning can cause extensive organ/system damage, including: a. Respiratory failure, circulatory system collapse, and skin
adell [148]

Answer:

The correct answer will be option-C

Explanation:

Lead is a metal found in the Earth's crust which through human practices like using it in paints and other products cause lead poisoning in humans due to accumulation of lead in the body.

Lead poisoning can affect the child above 6 years and adults and prove harmful as its increased concentration can cause severe health problems common of which are the development of anaemia due to large consumption, brain damage, reduced mental growth and severe stomach ache.

Thus, Option-C is the correct answer.

4 0
3 years ago
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