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alexira [117]
2 years ago
7

Which of the following is a signal from the environment?

Biology
1 answer:
e-lub [12.9K]2 years ago
6 0

Answer:

A. Stimulus

Explanation:

Trust, hope this is helpful !!!

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How does oxygen move through the blood?
Bond [772]

Answer:

Attached to hemoglobin.

Explanation:

The oxygen is important for the cellular functioning of cell. The carbon dioxide must be move out of the cell and oxygen should reach to each and every cell of the body.

Hemoglobin molecule has the ability to binds with the four molecules of oxygen. The oxygen moves in the body by binding with the hemoglobin molecules present inside the red blood cells.

Thus, the correct answer is option (a).

3 0
4 years ago
What is a job of the skatetal system? Remove wast. Protect organs. Exchange oxygen and carbon dioxide. Deliver nutrients to the
MrRa [10]

Answer:

The correct answer is - Protect organs

Explanation:

The skeletal system is the internal frame of the body that includes all the bones and joints present in the body. There are 206 bones in the adult human skeletal system.

The major roles of the skeletal system to help in movement, support, and protecting vital organs such as hearts, stomach, lungs, brain, and other organs. It also helps in movement and providing support to the body.

4 0
3 years ago
A ______ Membrane allows some, molecules to cross​
krok68 [10]

Answer:

Cell theory

Explanation:

Also known as the cell membrane.

8 0
4 years ago
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The steps in the process of endochondral ossification are a: Ossification center forms in the diaphysis b: Cartilage calcifies a
irina1246 [14]

Answer:

During the development of the fetus, the mechanism by which the mammalian skeletal system gives rise to tissues of the bone is termed as endochondral ossification. Endochondral ossification also plays an essential role at the time of the development of the long bones length, rudimentary generation of the long bones, and healing of bone fractures naturally.  

The following are the steps in the process of endochondral ossification:  

f. The development of the cartilage model.  

b. The calcification of cartilage takes place and the formation of bone collar occurs.  

a. In the diaphysis, the formation of the ossification center takes place.  

c. In the epiphysis, the formation of ossification centers takes place.  

d. Replacement of cartilage takes place by the bone.  

e. Ossification of epiphyseal plates takes place.  

8 0
3 years ago
Which of the following is an organism whose cells each contain a membrane-bound nucleus?
vovangra [49]

Answer:

A. A eukaryote cell

Explanation:

because eukaryotic cell is a cell which have a membrane - bounded nucleus

3 0
3 years ago
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