Answer:
mantle
Explanation:
Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs.
Answer:
Helicase enzyme checks the DNA for errors.
Explanation:
DNA polymerase proofreading: Proofreading by DNA polymerase corrects errors during replication.
The presence of algae is the characteristic of the photic zone of a freshwater ecosystem
Answer:
temperatures in the atmosphere change with altitude
Answer:
The correct answer will be option-A
Explanation:
The sympathetic nervous system is a type of the autonomic nervous system which mediates the homeostasis and stress response.
During stress condition, it initiates the hormonal response called fight or flight response by secreting acetylcholine from the adrenal medulla which stimulates the secretion of the epinephrine and norepinephrine.
This hormone produces an observable response like increase in the heart rate, widening of the bronchial passages, constriction of the blood vessels, pupillary dilation, perspiration and <em>decreases motility of the large intestine.
</em>
Thus, option-A is the correct answer.
