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77julia77 [94]
3 years ago
11

This is the descent of different species from a common species over many generations.

Biology
1 answer:
Maslowich3 years ago
4 0
This is not a question. Do you need anything answered?
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Cross bridge formation between myosin heads and actin molecules is caused by the elevation of calcium ion concentration in the c
almond37 [142]

Answer:

sarcoplasmic reticulum deteriorates and ATP production is stopped

Explanation:

Rigor mortis is the third stage of death characterized by stiffening of joints and muscles in body. The stiffening occurs because muscles are not able to return to the relaxed state. There are two reasons for rigor mortis, depletion of ATP and increase in calcium concentration in cytosol. Due to these factors the actin-myosin crossbridge is not able to break and the muscles remain in contracted state.

Sarcoplasmic reticulum deteriorates and calcium is released into the cytosol. Sarcolemma ( covering of muscle fiber ) also breaks down releasing extra calcium into the cytosol. Calcium is responsible for formation of actin-myosin cross bridge and when its concentration increases the bridge is formed continuously leading to stiffening of muscles and joints.  

3 0
3 years ago
When the elodea is underwater where is the carbon dioxide coming from
astra-53 [7]
The elodea is getting the carbon dioxide from its environment like when underwater animals breathe out carbon dioxide the plants will use that carbon dioxide. The plants can also get the carbon dioxide from the atmosphere which can "dissolve" in water.
5 0
3 years ago
During which of the following phases of the cell cycle Is DNA Replicated
sweet [91]

Interphase in the cell cycle encompasses the G1, S, and G2 phases, as it shows the period of growth and DNA replication that a cell must go through to prepare for mitosis. Cell division, which occurs during the M phase, is the only portion of the cell cycle that is not included in interphase.

6 0
3 years ago
The scientific name for the domestic dog is Canis familiarus and for the wolf, it is Canis lupus. The dog and the wolf are in th
Mashutka [201]

Answer:

genus

Explanation:

5 0
2 years ago
Read 2 more answers
In cellular reproduction, ___ ALWAYS occurs in 5’ to 3’ direction
attashe74 [19]

Answer:

DNA replication

Explanation:

DNA replication is the process whereby the genetic material (DNA) duplicates itself into two identical copies. This process must occur prior to any cellular division (meiosis or mitosis) in order to ascertain that each daughter cell gets an even and correct amount of DNA.

The process of DNA replication begins with the unwinding of the double stranded DNA molecule into two single strands of DNA. One strand called leading strand runs from 3'-5' while the other strand runs from 5'-3'. However, DNA replication proceeds in the 5'-3' direction.

4 0
3 years ago
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