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belka [17]
3 years ago
12

Question 12

Biology
2 answers:
Alex3 years ago
8 0

the correct answer to 12 is true

Anna11 [10]3 years ago
4 0
Question 12) False
Question 13) True
Question 14) True
Question 15) False
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In a grassland ecosystem, a prolonged drought has caused depletion in food sourſes for a species of rabbit
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Some individuals in the rabbit population must evolve traits that improve their survival chances
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Cells from advanced malignant tumors often have very abnormal chromosomes as well as an abnormal number of chromosomes. What mig
patriot [66]

Answer:

<u>Option- D: </u>Is the best choice to choose from the given options.

Now, let us explain the term Cell cycle in a more comprehensive way.

<u>As the cell cycle is controlled at three checkpoints.</u>

  • The integrity of the DNA is assessed at the G₁ checkpoint.
  • Proper chromosome duplication is assessed at the G₂ checkpoint.
  • Attachment of each kinetochore to a spindle fiber is assessed at the M checkpoint.

Explanation:

The cell cycle is controlled by three internal checkpoints that evaluate the condition of the genetic information.

  1. <u>The G₁ Checkpoint</u>:This stage determines whether all conditions are favorable for cell division to proceed. The cell can halt the cycle and attempt to remedy the problematic condition, or the cell can advance into G₀ (inactive) phase and await further signals when conditions improve.
  2. <u>The G₂ Checkpoint:</u> The most important role of the G₂ checkpoint is to ensure that all of the chromosomes have been accurately replicated without mistakes or damage.
  3. <u>The M Checkpoint:</u>It occurs near the end of the meta-phase stage of mitosis. it determines whether all the sister chromatids are correctly attached to the spindle micro-tubules
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2 years ago
Hypersecretion of prolactin from the anterior pituitary gland causes the condition of ________. dwarfism postpartum hemorrhage g
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Hypersecretion of the population from the anterior pituitary gland causes the condition of galactorrhea.

Prolactin is another name is called luteotropin and its main function is to enable mammals mostly female to produce milk. The pituitary gland secretes it in response to mating, estrogen treatment, ovulation, nursing and eating.

The pituitary gland is attached to the hypothalamus by a short stalk. The pituitary gland has two major parts.

(i)                  An anterior lobe

(ii)                Posterior lobe.

The pituitary gland is controlled by hormones and neurons that comes in the hypothalamus where it acts as a link between brain and endocrine system, and hypothalamus is the endocrine gland itself. Hypothalamus has neurons which regulate secretion of anterior lobe hormones by secreting inhibit and releasing  hormones. Every hormone produced by anterior lobe has a releasing hormone.

Prolactin and growth hormones have inhibiting hormone. Releasing hormone helps in stimulating production and it releases hormones from the anterior lobe.

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3 years ago
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As you finish your college degree, you learn that the mountain behind your childhood home in the hills of the town you grew up a
telo118 [61]

In this situation, I would try not to allow the exploitation of the mountain to occur, degrading nature and the property that her family has, because her brother may look for another job, but nature would not recover.

<h3>What are the impacts of coal mining?</h3>

The burning of coal for energy produces highly toxic effluents, such as mercury and other heavy metals such as vanadium, cadmium, arsenic and lead. In addition, the release of carbon dioxide causes pollution in the atmosphere, exacerbating global warming and contributing to acid rain.

With this information, we can conclude that Sedimentation and pollution of rivers due to improper disposal of unused material would make life on the family's property unfeasible.

Learn more about coal mining in brainly.com/question/12880911

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2 years ago
When the body is invaded by antigens, the immune system forms substances called?
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<span>Antibodies. A. k.a. immunoglobulins. They are produced by a group of white blood cells called B lymphocytes (or B cells). There are 5 classes of immunoglobulins; IgM,IgA,IgE,IgG and IgD.The classes of antibody diifferent both in their constant region and in their activity.IgG, the most common antibody, and is found mostly in the blood and tissue fluids, and IgA is localized in the mucous membranes which line the respiratory and gastrointestinal tracts.</span>
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