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Troyanec [42]
3 years ago
11

The region in the nucleus that is involved in ribosome production. *

Biology
1 answer:
Mumz [18]3 years ago
7 0

Answer:

nucleolus

Explanation:

The nucleus contains the cell 's DNA and directs the synthesis of ribosomes and proteins. Found within the nucleoplasm, the nucleolus is a condensed region of chromatin where ribosome synthesis occurs.

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Tuberculosis (TB) is a bacterial infection that has both an active phase and a latent phase. In the active phase, TB affects the
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I think it is the 2nd.
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3 years ago
The pop-up questions at the end of this level ask whether a banana is more closely related to a lemon or an onion. Why might the
Marysya12 [62]

Answer:

The reason why the final answer may be surprising to a lot of people is that

Onion is not a fruit, it is a vegetable while banana is a fruit; likewise, lemons and they are both yellow fruits.

Because they are both yellow fruits, one may have the thought that a lemon and a banana are more closely related.

It may also be confusing to lots of people because some plants that produce vegetables are more closely related to plants that produce fruits and it goes vise versa.

7 0
3 years ago
Is blood clotting an example of a positive or negative feedback mechanism? Explain your answer based on the description of the m
serg [7]

Answer:

Blood clothing is an example of positive feedback.

This type of feedback mechanism is useful to the body because it multiplies the factor that intervenes in clotting accelerating the process.

If a toxin affects the molecules that signal for platelets the feedback will not be effective enough to produce clotting and the body will keep bleeding.

Explanation:

Blood clotting is an example of positive feedback due to the fact that when the vascular endothelium is damaged  platelets will go to this area and activate themselves once they are in contact with the collagen fibers of the damaged structure. When the platelets are activated they will release the contents that is stored in their granules. One of the contents is a Gq-linked protein receptor cascade,  that will increase the concentration of calcium in the platelets. Calcium activates protein kinase C, which, in turn, activates phospholipase A2 (PLA2). PLA2  will modifies  an  integrin membrane  increasing its affinity to bind fibrinogen. The activated platelets change their  shape , and the fibrinogen cross-links with the integrin membrane aiding  in  the aggregation of adjacent platelets. After this the coagulation cascade takes place. there are two pathways the extrinsic  and the extrinsic one.

The extrinsic pathway will be activated due to tissular factor released  by the platelets and the intrinsic pathway will be activated due to endothelial collagen. The final product of both pathways is factor x.

Factor x will transform prothrombin into thrombin will activate the conversion of fibrinogen into fibrin. Thrombin will form a net of fibrin that will the clot.

A cascade reaction is useful because every component of the cascade are related making a quick reaction once that one of then is activated and can activate other or more factors.

If a toxin affects the molecules that signals for platelets, platelets will not go to the damaged area and in consequence there will not be thrombin and fibrin to form the clot together with platelets.

7 0
3 years ago
Which question can be answered by science?
xenn [34]

Answer: A . How much energy does it take to make a paper bag

Explanation: Apex

3 0
3 years ago
PLEASE HELP MEEE<br>Cells that can differentiate into a variety of cell types are called _____<br>​
Pani-rosa [81]

Answer:

pluripotent

Explanation:

A cell that can differentiate into all cell types of the adult organism are called

"pluripotent". Like cells are named meristematic cells in higher plants and embryonic stem cells in animals, though some groups report the presence of adult pluripotent cells.

3 0
3 years ago
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