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satela [25.4K]
3 years ago
14

Helper T cells give rise to all of the following cells except:

Biology
1 answer:
Monica [59]3 years ago
5 0

Answer:

except natural killer cells.

Explanation:

The Helper T cells produce cytotoxic T cells and help B cells, but not natural killer cells

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Anthocyanin is a pigment that gives flowers and leaves purple colors. The M gene codes for a transcription factor (Myb) that pro
eduard

Answer:

Anthocyanin is not produced in the plant cells

Explanation:

Anthocyanin is not produced in plant cells with the genotype mm.

As you can see from the question above, anthocyanin is responsible for the purple color of the flowers. Anthocyanin is encoded by the M gene, which is a dominant gene. Because it is a dominant gene, we know that it will be expressed in plants with the Mm and MM genotype, but will not be encoded by plants with the mm genotype. With this we can conclude that plants that have the mm genotype do not have purple color, because anthocyanin is not produced in the plant cells of these plants, since they do not have the M gene.

4 0
2 years ago
Suppose that ear length in rabbits is controlled by two additive genes, each of which has two alleles. A true-breeding female (a
PilotLPTM [1.2K]

Answer:

The ear length will be 11 cm.

Explanation:

To know about the ear length of F1 generation, we need to know that how much length in centimeters is contributed by each of the alleles. As we know, each allele has the same value for contributing to the effect of ear length, hence we can divide the ear length by 4 to get our results.

As 6 divided by 4 is 1.5 hence, the allele a and b contribute to 1.5 cm of the length of the ear.

6 divided by 4 is 4, hence the alleles And B contribute to 4 cm of the length of the ear.

The F1 generation will have AaBb genotype hence, the lenght will be 4+1.5+4+1.5 = 11 cm.

6 0
3 years ago
"If Jennifer wants to reduce the risk of having a baby with a birth defect caused by an environmental substance like drugs or al
Liula [17]

Answer:

Jennifer should understand that exposure to teratogens can cause the most damage during exposures such as <em>the duration of exposure, the amount of teratogenic substance, and the stage of development the embryo or fetus is in during the exposure. </em>

Explanation:

<em>Teratogens</em> may affect the embryo or fetus in a number of ways, causing physical malformations, problems in the behavioral or emotional development of the child, and decreased intellectual quotient (IQ) in the child. Additionally, <em>teratogens</em> may also affect pregnancies and cause complications such as preterm labors, spontaneous abortions, or miscarriages. <em>Teratogens </em>are classified into four types: physical agents, metabolic conditions, infection, and finally, drugs and chemicals.

6 0
3 years ago
Read 2 more answers
A palavra átomo tem origem grega,com o significado de indivisível.Por que esse termo foi escolhido para descrever as partículas
earnstyle [38]
  • Translated from Portuguese language:

"The word atom has a Greek origin, meaning indivisible. Why was this term chosen to describe the particles that form matter? Is the atom really indivisible?".

Answer:

  1.  An atom is termed as the basic unit for generating or creation of the different complex structures, as they are characterized by the different shapes and properties due to position or alignment of the different number of atoms inside the given parameters or are of the object.
  2. It was a belief in the early times that atom is not divisible further in to small sub atomic parts, this concept was improved by the experiments of the cathode ray tube etc.          

Explanation:

  • However, the atom is comprised of the following subatomic particles which are as follows:
  1. The nucleus is comprised of the protons(positrons) and neutrons.
  2. While, the outer region or the cloud is comprised of the electrons inside the different shells and orbits.
4 0
3 years ago
Which statement explains something that the fossil record indicates? Earth is 4.5 billion years old. Mammals have always existed
lys-0071 [83]

Answer:

C

Explanation:

I took the test edge2020

6 0
3 years ago
Read 2 more answers
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