Answer:
<h2>A. G¹ phase</h2>
<u>Explanation:</u>
In G¹ phase - RNA and Proteins are synthesised and the volume of Cytoplasm increase.
Answer:
A) the concentration of calcium ions in the sarcoplasm of a resting muscle
Explanation:
Sarcoplasmic reticulum is a system of the membranous sac that is present around each myofibril and is filled with calcium ions. When muscles are in the resting stage, calcium ions are stored in the sarcoplasmic reticulum.
As the muscle action potential triggers change in voltage-gated calcium ion channels of the sarcoplasmic reticulum, the channels are opened to release the calcium ions in the sarcoplasm. Increased calcium ion levels in sarcoplasm make the muscle fibers to contract.
Removal of acetylcholine from the synaptic cleft ends the production of muscle action potential and calcium ions are moved back from the sarcoplasmic reticulum.
Hence, lower levels of calcium ions are maintained in sarcoplasm when the muscles are in the resting stage.
I believe the answer would be C. Because all worms normally have round bodies, and yes, they can be slender. They also don't really have nostrils, they can breathe through their skin even though they don't have lungs. So C. would be the best answer.
Answer:
The correct answer is 3. Endosymbiotes
Explanation:
According to the endosymbiotic theory, mitochondria was a prokaryotic organelle which was engulfed by ancestral cell. Then this bacteria remain in a symbiotic relationship with ancestral cell and evolved in mitochondria which can synthesize ATP and replicated its own genome, able to duplicate and divide.
So mitochondria are considered as endosymbiotes which means they are organism which lives inside others body and cannot live or function on their own. This theory is supported by genetic evidence that shows similarities between mitochondria and bacteria. So the correct answer is 3.
