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masya89 [10]
2 years ago
10

Can someone please answer this!

Biology
1 answer:
ololo11 [35]2 years ago
4 0

Answer:

d.) All of the above

Explanation:

Prophase is the first stage of mitosis. In this phase, the DNA condenses into chromosomes. The nuclear membrane breaks down, and the centrioles move to opposite sides of the cell.

The next phase is metaphase, where the condensed chromosomes move to the centre of the cell.

Next, during anaphase, the chromosomes are separated to either end of the cell

Finally, during telophase and cytokinesis, the nuclear membrane reforms and the chromosomes begin to decondense, and the cytoplasm splits to form two cells.

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Match each product of pyruvate metabolism with the condition under which it is produced.
timofeeve [1]

Answer: The products of pyruvate metabolism are lactate, ethanol and acetyl CoA

Explanation:

Lactate: Lactate is produced by anaerobic fermentation that takes place in the skeletal muscles in humans.

Ethanol: Ethanol is produced through fermentation process yeast and bacteria.

Acetyl CoA: Aerobic Oxidation of pyruvate give rise to acetyl CoA is which the starting molecule in the citric acid cycle.

7 0
3 years ago
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Which statement is an example of a scientific theory?
Vladimir79 [104]

Examples of a scientific theory

Scientific theories are testable and make falsifiable predictions. They describe the causes of a particular natural phenomenon and are used to explain and predict aspects of the physical universe or specific areas of inquiry (for example, electricity, chemistry, and astronomy).

3 0
3 years ago
Explain how the terms oxidation and reduction apply even when there is only a partial shift of electrons between atoms linked by
aliina [53]

Explanation:

In a covalent bond, there is sharing of the donated electron by two atomic species having very small electronegative differences between them.

Oxidation is the loss of electrons by a specie and it usually lead to an increase in oxidation number.

Reduction is the gain of electrons by a specie. It leads to a lower oxidation number.

Since there is no actual loss of gain of electrons in a covalent body, the electronegativiy is at work.

Electronegativity is the ability of a specie to draw the shared electrons more to itself in a covalent bond.

  • Between two atoms bonded covalently, the more electronegative specie draws the electrons closer.
  • This leaves a partial negative charge on it.
  • The other electron then becomes partially positively charged.
  • We can then say, the more electronegative specie undergoes reduction.
  • The less electronegative one undergoes oxidation.

learn more:

Covalent bond brainly.com/question/3064597

Oxidation and reduction brainly.com/question/2278247

#learnwithBrainly

5 0
3 years ago
What is the basic difference in effector function between helper and cytotoxic T cells?
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Answer:

Helper T cells stimulate B-cells to produce antibodies and killer T cells to destroy the non-self cells. Cytotoxic T cells on the other hand are direct attack cells. They can kill the micro organisms by creating pores on the invader's cell.

Explanation:

T lymphocyte mediated immunity of cell mediated immunity do not secrete antibodies but they help stimulate the B cells to produce them. Immature T cells are produced in bone marrow from where they migrate to thymus via blood. In the thymus maturation of T cells occur and then they migrate to lymphoid tissue and get differentiated into three types:

a. Helper T cells: As the name suggests, they help in activating other immune cells, in other terms they are the regulator of virtually all functions of immune system. Protein mediator called lymphokines are produced by these helper T cells in order to regulate the immune functions. Some examples of these lymphokines are: Interleukin-2 interleukin-3, interferon gamma. T helper cells stimulate the B-cells to produce antibodies.

b. Cytotoxic cells or killer T cells: The lymphokine interleukin-2 is responsible for the growth and proliferation of both cytotoxic T cells and suppressor T cells. With the help of receptor proteins on the surface of killer T cells, they bind to the specific antigen. After binding, they secrete a pore forming protein called perforins which create pores on the invaders cell membrane for water to enter into it thereby cell swells and finally lyse.

c. Suppressor T cells: They suppress the function of above two T cells.

5 0
3 years ago
Differentiate between gamopetalous and polypetalous​
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Answer:

the difference between polypetalous and gamopetalous, is that polypetalous is (botany) having a corolla composed of distinct, separable petals while gamopetalous is (botany) having petals wholly or partially fused such that the corolla takes the form of a tube.Explanation:

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3 years ago
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