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Firlakuza [10]
3 years ago
13

NEED ANSWER QUICK!!!!!!! Could humans survive on Earth over two-and-a-half billion years ago, before the emergence of plants? Wh

y or why not?
Biology
1 answer:
emmasim [6.3K]3 years ago
3 0

Answer:

I'm say yes

Explanation:

because we had animals to survive off of

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Hii! i’ll give brainliest pls help
kari74 [83]

Answer:a or b not sure

Explanation:

8 0
3 years ago
Read 2 more answers
The backbone vertebrae, skull, and rib cage make up the _______ skeleton. Among other types of cells, bone marrow produces _____
Rom4ik [11]

Answer:

1. axial

2. red

3. Osteoblasts

4. osteoporosis

5. Ligaments

Explanation:

The axial skeleton consists of the bones of the head and trunk of a vertebrate including skull, and rib cage.

Bone marrow produces red blood cells, which carry oxygen in the blood.

Osteoblasts can become osteocytes, which are the third type of bone cells.

Osteoporosis  is a bone resorption disease in which bones rapidly deconstruct faster than new bone tissue grows, and decreases the mechanical strength of bones.

Ligaments connects one bone to other at joint such as medial collateral ligament (MCL) and anterior cruciate ligament (ACL) that joins knee.

Hence, the correct answer for the question is as follows:

1.axial

2. red

3. Osteoblasts

4. osteoporosis

5. Ligaments

Hope it helps

7 0
3 years ago
persons with type O- blood are often referred to as the "universaldonors" based on the antiagens found on type O- blood cells an
Xelga [282]

Answer: The statement is true

Explanation:

Persons with type O- blood are often referred to as the "universaldonors" based on the presence of neither type A or B antigen on the red blood cell, coupled with anti-A and anti-B antibodies. Hence, since

the type O blood lacks antigens, it does not clump when mixed with any of the other blood types in the recipient plasma

Thus, the type O blood is a universal donor

3 0
4 years ago
Which areas of the ocean are absorbing more CO2 from the air?
Sonja [21]
Cold Southern Oceans like the Pacific, Atlantic, Indian, etc. are collecting CO2 from the air!
4 0
3 years ago
What a meteor is called before it enters Earth’s atmosphere
PSYCHO15rus [73]

Answer:

A meteor, before entering earth's atmosphere is known as a meteoroid

5 0
3 years ago
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