Answer:
Because the trophozoites are unable to survive outside a host.
Explanation:
The term infectious is used for a disease or microorganism that can be transmitted from one organism to the other organism through the environment. If we look at the two forms of Giardia, we find that out of the two forms viz. cysts and trophozoites, only the cysts of Giardia have the ability to remain alive in the environment outside the host and thus they are able to be transmitted to the other organisms. On the other hand trophozoites are not able to survive in outside environment so there is no chance of transmission of trophozoites.
I believe increased blood pressure indicates the presence pf pheochromocytoma. The increased blood pressure could be due to the increased production of catecholamines, indicating a lack of balance in the endocrine. Pheochromocytoma is a neuroendocrine tumor of the medulla of the adrenal glands or extra-adrenal chromaffin tissue that failed to involute after birth, that secretes high amounts of catecholamines (norepinephrine or epinephrine).
The answer is signal transduction. It is also known as cell signaling. It is the transmission of molecular signals beginning from a cell's exterior to its interior. Signals got by cells must be transferred efficiently into the cell to make certain a suitable response. This step is started by the cell-surface receptors.
Answer:
In the sporophyte phase a diploid (having two sets of chromosomes) plant body grows and eventually produces spores through meiosis. These spores divide mitotically to produce haploid (having a single set of chromosomes) gamete-producing bodies called gametophytes.
Explanation:
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