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Dimas [21]
3 years ago
12

The heart is the most

Biology
1 answer:
svetoff [14.1K]3 years ago
7 0

Answer:

The main function of the circulatory (or cardiovascular) system is to deliver oxygen to the body tissues, whilst simultaneously removing carbon dioxide produced by metabolism.

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LDL (low-density lipoprotein) contains
Basile [38]

Answer:The correct answer is " a"

LDL contain protein,triglycerides,phospholipid and cholesterol.

Explanation:

Low density lipoprotein,or LDL,are complex aggregates of lipids and protein.Their function is to transport lipids (fats) around the body,in the bloodstream,and to the cells where its required.Apart from this,it also carries triglycerides,phospholipids and fat soluble vitamins.

Lipoprotein is composed of a hydrophobic core that is made up of polyunsaturated fatty acids and cholesterol molecules,along with a lipid membrane that contains protein called apolipoproteins.

There are 4 major classes of lipoprotein:

•chylomicrons

•very low density lipoprotein(VLDL)

•high density lipoprotein (HDL)

•low density lipoprotein(LDL)

7 0
3 years ago
Organisms become extinct for many reasons. All BUT one is reason for extinction. That is
igomit [66]

Answer:

A) Adaptations

Explanation:

If a species learns to adapt to their environment, then they will not become extinct

5 0
3 years ago
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True or false: T lymphocytes produce antibodies
Fed [463]
I believe the answer is true.
3 0
4 years ago
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How far back are ancestors ?
ivann1987 [24]

Answer:

The Last Universal Common Ancestor (LUCA) is the most recent common ancestor of all current life on Earth, estimated to have lived some 3.5 to 3.8 billion years ago

pls mark brainliest

Explanation:

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3 years ago
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Grassland ecosystems receive very little precipitation. The predominant plants are grasses, and drought and wildfire are common.
elixir [45]
Hi hope I can help, I think the answer isB
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