Answer:
Macromolecules provide energy to our body.
Explanation:
Fats, carbohydrates and proteins are needed for a healthy diet because these macromolecules provide energy to our body. Fats are the macromolecules that can be broken down into micromolecule i.e. fatty acids, carbohydrates are broken down into glucose molecule and proteins are broken down into amino acids which can be absorbed by our body for the generation of ATP molecules. Beef, chicken, lamb, livers, meat extracts, mackerel, anchovies, and sardines are the food sources that has high amount of nucleic acid.
Answer:
The correct answer will be- Transverse tubules
Explanation:
Transverse tubules are the tubular structure formed by the extension of the plasma membrane which innervates the cardiac and skeletal muscle cells. The T-tubules structure is structured between 20-40 nm and located at the junction of the I and A band.
The signals from the motor neurons once raches the motor endplate in muscles are carried into the muscles by these T-tubules which transmits the signals to muscle cells at very high speed. The T-tubules cause the release of the Calcium ions from the sarcoplasmic reticulum that cause contraction of the skeletal muscle.
Thus, Transverse tubules are the correct answer.
Answer:
The last one since estuaries are highly affected and are dependent on tides
Answer:
A = 4000 years
Explanation:
Given data:
Half life = 2000 years
Total mass = 100 g
Mass remain = 25 g
Time taken to reduces to 25 g = ?
Solution:
At time zero = 100 g
At first half life = 100 g/2 = 50 g
At 2nd half life = 50 g / 2 = 25 g
Time taken:
Half life = Time elapsed / number of half lives
2000 years = Time elapsed / 2
Time elapsed = 2000 years × 2
Time elapsed = 4000 years
