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Natalija [7]
3 years ago
12

What prevents the lac genes in the DNA of E. colin from being expressed most of the time ?

Biology
1 answer:
Alona [7]3 years ago
3 0
The lac repressor prevents the lac genes in the DNA of E. coli from being expressed most of the time. The answer to your question is A. I hope this is the answer that you are looking for and it comes to your help.
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Definition of “principle of dominance”
Inessa05 [86]
The Law of Dominance says that when an organism is heterozygous for a trait, only the dominant allele will produce a phenotype.
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3 years ago
When you are frightened by something, what part of the brain directs your body to react by making your heart beat faster and inc
Leto [7]
The answer is A. The Cerebellum.
8 0
3 years ago
A 57-year-old man is evaluated in the clinic for a routine physical exam. He is followed for hypertension and hyperlipidemia. He
andrew-mc [135]

Answer:

d. Measure thyroid-stimulating hormone level

Explanation:

The most suitable next step in management of this patient is to measure a thyroid stimulating hormone, or thyrotropin level.

This patient's apparent treatment refractory dyslipidemia is most likely contributed by undiagnosed thyroid disease. Despite sticking to the treatment with atorvastatin, his  LDL AND total cholesterol are raised.

Additionally, there are some clinical signals that give an idea about the diagnosis of hypothyroidism especially  fatigue and constipation.

Hypothyroidism is concerned with and is a very common secondary cause of dyslipidemia and thyrotropin level measures are indicated.

Hyperlipidemia may show better results to thyroid stimulating hormone.

Hence option D is the right answer.

8 0
3 years ago
Describe photosynthesis in as the key process producing new plant biomass.
Anettt [7]

Answer:

Plant biomass will increase as a result of photosynthesis. During photosynthesis, plants produce glucose and oxygen from carbon dioxide and water, using light energy from the Sun. ... Photosynthesis is an endothermic reaction as it requires light energy to react carbon dioxide and water to produce glucose and oxygen.

7 0
3 years ago
Flower color in the varieties of pea plants studied by Mendel is controlled by alleles at a single locus. A group of peas homozy
VladimirAG [237]

Answer:

Option 1, 0

Explanation:

Complete question

Flower color in the varieties of pea plants studied by Mendel is controlled by alleles at a single locus. A group of peas homozygous for purple flowers is grown in a garden. All flowers are purple, yet there is some variation in the intensity of the purple color. The estimated heritability for this observed variation in flower color would be

  1. 0.
  2. 0.5.
  3. 0.75.
  4. 1.
  5. Cannot be determined without additional information

Solution

Given all the pea plants in the garden are homozygous purple (PP)

If we cross two PP parents, the following offspring will be produces

PP * PP

PP, PP, PP, PP

This means that all offspring are also homozygous purple.

Thus, chances of inheriting variation in the purple color of offspring are negligible. However, the variation in their color can be due to their individual interaction with the variable factors in the environment

Hence, option 1, 0 is correct

6 0
3 years ago
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