The accurate statements to the signal transduction pathways are as follows:
1. A receptor changes conformation upon attachment, conducting a signal across the cell membrane.
2. A second messenger may carry a signal from the cell membrane to an organelle.
3. Signal transduction cascades, often involving protein kinases, amplify a signal intracellularly.
4. A receptor may pass on a signal by associating with another protein or by functioning as an enzyme.
5. A ligand, like hormone, combines with a specific cell surface receptor on a target cell.
6. Phosphatase eradicate phosphoryl groups from polypeptides, monitoring the response of the cell.
<span>sotonic Solution. Isotonic-no water movement across the cell membrane since the concentration of ions are farily equal in and out of the cell. Hypertonic-a condition where cell loose it water content and ultimately plasmolyze due to the higher ionic concentration outside the cell than inside.
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The vegetal pole of a frog zygote differs from the animal pole in that the vegetal pole has a higher concentration of yolk.
After the fertilisation of the egg by the sperm in a frog, three regions are formed in the zygote. These are:
- Upper animal hemisphere or upper animal pole which shows pigmentation.
- The grey crescent which is a small area with almost no pigmentation. It is present in between the upper animal pole and the lower vegetal pole.
- Lower animal hemisphere or lower vegetal pole which is white in color.
Thus, the vegetal pole of a frog zygote differs from the animal pole in that the vegetal pole has a higher concentration of yolk.
Learn more about the frog zygote here: brainly.com/question/14951741
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Considering t<span>here are two predominant </span>types<span> of volcanic </span>eruptions<span>: Effusive </span>eruptions<span> and Explosive </span>eruptions. Rhyolite is associated with Explosive eruptions. <span>Many eruptions of rhyolite are highly explosive.</span>
