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Virty [35]
3 years ago
12

To test how fertilizer affects tomato plants, a farmer divided a field of young tomato plants into 10 plots of equal size. The f

armer then put fertilizer on half of the plots and no fertilizer on the other half of the plots. What is the control group in this experiment?
Biology
1 answer:
earnstyle [38]3 years ago
6 0
The control is the group of no fertilizers.
A control in an experiment is usually the group without the variable to be tested. In this case, the farmer wanted to test the effects of fertilizers, therofre the group without it is the control group.
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The barley plant has seven pairs of chromosomes. For a gamete, the number of genetic combinations that are possible through inde
skad [1K]

Answer:

1. 128

2. 16,384

Explanation:

Imagine there were two pairs of chromosomes:

A paired with B

C paired with D

A gamete could have the following combinations:

A + C

A + D

B + C

B + D

Therefore, with two pairs of chromosomes, there are 4 (2²) possibilities

With seven pairs of chromosomes, there are  (2⁷) possibilities. 2⁷  = 128

For a zygote produced by two barley parents, there are two gametes fused. So we must multiply the number of combinations for each gamete. Therefore, number of possible genetic combinations is 128 x 128 = 16,384

4 0
3 years ago
What test can determine if a person has hiv or tell how much a virus is present in the blood
Rufina [12.5K]

Answer:

Yes, tests like urine and blood tests.

Explanation:

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3 0
2 years ago
Primary function of the central vacuole
BlackZzzverrR [31]
To maintain pressure within plant cells and keep structure while growth ensues. Good luck, milady. *Tips his fedora*
7 0
3 years ago
A mutation is made once in every __________________ nucleotide copied.
aliina [53]

10^9 this is the answer


4 0
3 years ago
The first commercial application of genetic engineering was the use of bacteria to make insulin, a medicine needed by diabetics.
Murljashka [212]

Answer:

The question is incomplete, it lacks options. The options are:

A) It has made the demand for insulin decrease.

B) It has made the incidence of diabetes decrease.

C) It has made it easier for diabetics to inject themselves with insulin.

D) It has made insulin cheaper and more readily available.

The answer is D

Explanation:

Genetic engineering is a biotechnological procedure that involves the transfer of genes from one organism to another using biotechnology. In this case, bacteria cells are said to be genetically modified because their genetic content is tampered with and the genes that produces the insulin protein in humans is added into their genome. Hence, they transcribe and translate this gene to produce the protein-insulin.

Diabetic patients cannot produce this insulin in their system. Hence, the insulin produced from this genetically modified bacteria cells can be administered to diabetics via injection. This genetically modified way of producing insulin has proven to be a far better option to the previous practice of slaughtering cattles and pigs to obtain this protein because the GM method allows insulin to be produced in large amounts making it available and cheaper to diabetics.

7 0
3 years ago
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