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djverab [1.8K]
3 years ago
6

A student is designing a controlled experiment to test whether the amount of water that a plant receives affects its growth. Whi

ch variable should the student change?
Biology
2 answers:
MA_775_DIABLO [31]3 years ago
5 0
The amount of water should be changed by the student
Alina [70]3 years ago
4 0

Answer: The amount of water .

Explanation: it's because if we don't change the amount water then we will have the same value as before.

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Why is Catalase important to the body?
oksian1 [2.3K]

Answer:

Catalase behaves as a catalyst for the conversion of hydrogen peroxide into water and oxygen.

Explanation:

Catalase is an antioxidant enzyme that plays a very important role in the protection against oxidative damage by breaking down hydrogen peroxide. It is a very highly conserved enzyme that has been identified from numerous species including bacteria, fungi, plants and animals.

Catalase has one of the highest turnover numbers for all known enzymes (40,000,000 molecules/second). This high rate shows an importance for the enzymes capability for detoxifying hydrogen peroxide and preventing the formation of carbon dioxide bubbles in the blood.

7 0
3 years ago
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How are traits passed down from one generation to another
velikii [3]

Answer:

Genes & DNA

Explanation:

Heritable traits are known to be passed from one generation to the next via DNA, a molecule that encodes genetic information.Organisms inherit genetic material from their parents in the form of homologous chromosomes, containing a unique combination of DNA sequences that code for genes.

7 0
2 years ago
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Two insecticides will be compared for their effectiveness in eliminating aphids on tomato plants. Forty tomato plants of the Big
densk [106]

Answer:

The t-test

Explanation:

<em>The researcher should use a t-test to compare the two means and check if they are significantly different from each other.</em>

In using the t-test, both null (H0) and alternate (H1) hypothesis are made such that:

  • H0: n1 = n2
  • H1: n1≠ n2

Thereafter, the value of t is calculated and compared to its critical value on the table. The formula for calculating the t goes thus:

t = \frac{Y_1 - Y_2}{\sqrt{\frac{S_1}{n_1} + \frac{S_2}{n_2}  } }

where, Y1 = mean of population 1, Y2 = mean of population 2, S1 = variance of population 1, S2 = variance of population 2, n1 = number of individuals in population 1 and s2 = number of individuals in population 2.

<em>At the end of the day, if the calculated t value is more than the critical value of t, the H0 is rejected and it shows that the two means are significantly different. Otherwise, the H0 is accepted and this shows that there is not significant difference between the mean of population 1 and that of 2.</em>

7 0
3 years ago
How does a cladogram show the relationships among organisms?
malfutka [58]

Answer:

Background Information: A cladogram is a diagram that shows evolutionary relationships among groups. It is based on phylogeny, which is the study of evolutionary relationships. ... Each letter on the diagram points to a derived character, or something different (or newer) than what was seen in previous groups.

5 0
2 years ago
The pea aphid, a type of insect, contains light-capturing pigments in its exoskeleton. Pea aphids gained the ability to synthesi
EastWind [94]
<h2>Answer:</h2>

Based on the information given we can not say pea aphid as an autotroph. Because pea aphid ability to produce ATP in the presence of sun is due to the light-capturing pigment that it gains from the genes transferred from fungi.

As pea aphid do not have any chloroplast and it cannot fix carbon so it is not a true autotroph. We can say it false autotroph because it can produce ATP in the presence of sunlight and can show increased production of ATP at the higher level of pigment.

8 0
3 years ago
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