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Kipish [7]
1 year ago
13

Both the brain and the spinal cord are protected by

Biology
1 answer:
Veronika [31]1 year ago
6 0
I believe that would be B.
Correct me if wrong.
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Blood typing is based on the presence of proteins known as __________ on the outer surface of the red blood cell plasma membrane
tensa zangetsu [6.8K]

Answer: Option B) Antigens

Blood typing is based on the presence of proteins known as antigens on the outer surface of the red blood cell plasma membrane.

Explanation:

Blood groups A, B, AB, and O are determined based on the antigen-antibody reactions between donor and recipient bloods.

For instance,

- Blood type A has antigen A on its plasma membrane

- Blood type B has antigen B on its plasma membrane

- Blood type AB has both antigen A and antigen B on its plasma membrane

- while blood type O has neither antigen A nor B on its plasma membrane

So, antigens is the answer

8 0
3 years ago
There is a sudden decrease in the food availability for wading birds. Make a claim about how the different levels of organizatio
Law Incorporation [45]

Answer:

I'm sorry I can't answer this I'm trying to get more points

8 0
3 years ago
Choose three nutrients and explain how a plant may look if it has a deficiency in those nutrients.
ozzi

Answer:

A nutrient can be described as a substance which is used for the survival, growth and reproduction of an organism.

Three nutrients which plants require are:

NITROGEN (N): Nitrogen is important for growth and immunity. Without nitrogen, the plant will not be able to grow or produce immunity.

PHOSPHORUS (P): Strengthens root systems, capacity for seed creation, disease resistance, and pest prevention. Improves flowers and blooming. Also strengthens tissues and flavors in edibles and veggies. Without phosphorus, plants will not be able to produce sweet fruits.

CALCIUM

Strengthens and fortifies overall tissues everywhere. Also helps neutralize acidity, both within the plant and in its surrounding soil, for optimal health.

8 0
3 years ago
Why were the first living things on Earth only anaerobic bacteria?
schepotkina [342]
Maybe because they like coacervates.
6 0
2 years ago
Which structure is found only in plant cells and helps plants capture energy from sunlight?
Lynna [10]

Answer:

Chloroplasts

Explanation:

Chloroplasts are the food producers of the cell. The organelles are only found in plant cells and some protists such as algae. Animal cells do not have chloroplasts. Chloroplasts work to convert light energy of the Sun into sugars that can be used by cells.

5 0
3 years ago
Read 2 more answers
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