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raketka [301]
3 years ago
7

PLEASE HELP WILL MARK BRAINLEST!!!

Biology
1 answer:
nevsk [136]3 years ago
5 0
I’m pretty sure it’s C if not A
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What occurs if a t cell binds to an antigen and the t cell does not receive a co-stimulatory signal?
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The correct answer is that "the T cell enters a state of anergy".

The activation of T cells requires two signals: (1) antigen specific signal presented by an antigen presenting cell (either a macrophage or a dendritic cell) that activates t cell receptors and (2) co-stimulatory signals that is not antigen specific but rather found in the plasma membrane of the antigen presenting cell (i.e. CD28). In the absence of a co-stimulatory signal, the t cell will enter a state of anergy or the inability to produce an immune response toward an offending antigen.
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Name 3 ecosystem services soil provides that are critical for life
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There, ecosystem services are grouped into four broad categories: provisioning, such as the production of food and water; regulating, such as the control of climate and disease; supporting, such as nutrient cycles and oxygen production; and cultural, such as spiritual and recreational benefits.

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Explain the digestion process of a complex carbohydrate by arranging the statements in the order that they occur.
andreyandreev [35.5K]

Answer: The question is incomplete because the options are not given, here are the options from another websites.

A.The enzyme, amylase. which is present in saliva breaks potysaccharide chains into disaccharides.

B. Other enzymes in the small intestine further break the potysaccharide into monosaccharides.

C. You take a bite and to chew the complex carbohydrate into smaller pieces.

D.Amylase is deactivated by the low pH in the stomach.

E.. Monosaccharides are absorbed through the intestinal wad.

The correct order are,

C. You take a bite and to chew the complex carbohydrate into smaller pieces.

A.The enzyme, amylase. which is present in saliva breaks potysaccharide chains into disaccharides.

D.Amylase is deactivated by the low pH in the stomach.

B. Other enzymes in the small intestine further break the potysaccharide into monosaccharides

.E. Monosaccharides are absorbed through the intestinal wad

Explanation:

Carbohydrates are complex or large molecules are they are found in rice, bread e.t.c

Digestion of carbohydrates start from the mouth through a process called mastication i.e chewing of the carbohydrates. The salivary gland then secrete the salivary amylase which act on the chewed carbohydrates. The salivary amylase breaks down amylose and amylopectin present in starches into smaller chains of glucose which is called dextrins and maltose. When it get to the stomach, the amylase cannot further break it because it does not work in acidic conditions. The substance form chyme in the upper stomach and pancreatic enzymes act on it to break it down into simple sugar glucose. The pancreatic enzymes include sucrase, maltase and lactase.

Sucrase breakdown sucrose into glucose and fructose, maltase breakdown maltose in two molecules of glucose and lactase breakdown lactose into galactose and glucose. The simple sugar are then absorbed into the blood through the intestinal wall.

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The earliest classification systems grouped organisms based on
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Answer:

On the basis of physical traits.

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