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Alenkasestr [34]
3 years ago
12

Can someone help me i need 5 different jobs of bones science 7th grade

Biology
1 answer:
Nuetrik [128]3 years ago
5 0
Support, Protection, Movement, Blood cell production, and Calcium.
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What is the difference between meiosis i and meiosis ii.
beks73 [17]

Explanation:

Meiosis I has one diploid parent cell and ends with two haploid daughter cells, splitting the number of chromosomes in each cell. Meiosis II starts with two haploid parent cells and ends with four haploid daughter cells, maintaining the number of chromosomes in each cell.

5 0
3 years ago
The subsections of a myofibril that perform muscle contraction are called
horrorfan [7]

Answer:

Sarcomere

Explanation:

The sarcomere is the smallest contractile unit of muscle. It extends from one Z disc to the next and therefore, is the region between two consecutive Z discs. It contains an A band flanked by half an I band at each end. Contraction of a muscle fiber occurs as the sarcomeres within the myofibrils shorten. During the shortening of the sarcomere, the thin actin filaments slide past the thick myosin filaments and approach one another. The resultant shortening of the I band and complete disappearance of H zone cause contraction of muscle fiber.

3 0
3 years ago
1. Things that have all the characteristics of life are ___________________.
Alecsey [184]

Answer:

organisms

single celled

false

8 0
2 years ago
How does an increase in the use of coal affect biodiversity and air and water quality in a region?​
egoroff_w [7]

Answer:

by developing more efficient methods of mining coal  

Explanation:

Coal is a combustible black or brownish black sedimentary rock. Coal is produced by the dead plant matter. It is a fossil fuel that is used for generating electricity in the thermal power plants, used as cooking fuel, and fuel in automobiles. The burning of the coal results in the liberation of carbon dioxide, sulphur dioxide and carbon monoxide gases in the environment. These gases are responsible for causing the air pollution.

Developing more efficient methods of mining coal is not a conservation tactic related to coal consumption because the more the efficient mining will promote the excavation of the coal, which will further contribute to its extensive consumption and air pollution.

3 0
2 years ago
3. Describe how the nervous system helps different parts of your body communicate with one another the moment you begin to pet a
Brilliant_brown [7]

Answer:

When petting a dog, mechanoreceptors in the skin of your hand send signals to the sensory neuron. The sensory neuron connects to your spinal cord and through your brain.

Explanation:

5 0
2 years ago
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