Answer:
<span>When a newly found cells enters into interphase and begins conducting metabolic functions,it is in G1 phase.
Reason:
Inter-phase is composed of:
1. G1 phase:
In this phase normal metabolism and growth of newly formed cell occurs.
2. S phase:
In this phase DNA replication occurs.
3. G2 phase:
In this phase cell prepare themselves for division.</span>
Answer:
Explanation:
Muscle contraction is stimulated by the movement of an action potential moving along a nerve fiber to the muscles. This event follow some series of process before being stimulated.
1. The impulse arrives at the synapse and travels through the transverse tubules.
2. The muscle impulse reaches the sarcoplasmic reticulum and calcium is released.
3. Calcium floods the sarcoplasm and binds to troponin molecules leaving active sites.
4. Tropomyosin molecules bind to exposed active sites, linking actin and myosin.
5. Thin filaments are pulled over the thick filaments.
6. The muscle fiber shortens and contracts.
Well mutations can be a positive or a negative feature. Some mutations can be used as a camouflage so stay safe from predators. Other mutation could give off a bright color which would make it hard to stay hidden from predators.
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