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MArishka [77]
2 years ago
13

Why do virus need a host

Biology
2 answers:
Anika [276]2 years ago
6 0
Viruses depend on the host cells that they infect to reproduce. When found outside of host cells, viruses exist as a protein coat or capsid, sometimes enclosed within a membrane. The capsid encloses either DNA or RNA which codes for the virus elements
zzz [600]2 years ago
4 0
So that it can spread out I think
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When the knee is bent, the hamstring group of muscles contract. What is the insertion of this muscle group?
DIA [1.3K]

Answer:

The Knee Flexor Muscles

Explanation: The Hamstrings All three hamstring muscles originate from the ischial tuberosity and run toward the knee. The biceps femoris muscle is inserted into the head of the fibula. It can rotate the lower leg so that the foot points laterally.

5 0
3 years ago
"the _____ controls the release of our body s stress hormone, cortisol."
zepelin [54]
The correct answer is HPA axis.

The Hypothalamic-Pituitary-Adrenal (HPA) axis is one of the most important neuroendocrine systems, which regulates the stress response and other functions such as the digestion, mood, emotions and the immune system.

The hypothalamus, when triggered by a possible stressor, releases two hormones; the vasopressin and the corticotropin-releasing hormone (CRH). CRH, in turn, triggers the release of the adrenocorticotropin hormone (ACTH) from the pituitary gland. As a result of the secretion of ACTH, cortisol is secreted by the adrenal cortex.

Cortisol is a steroid hormone, considered to be our body's stress hormone.
3 0
2 years ago
Changing from a gas to a liquid is called
MAXImum [283]
Changing from a gas to a liquid is called <span>condensation.</span>
6 0
3 years ago
From which part of the pituitary are hypothalamic hormones such as antidiuretic hormone (adh) and oxytocin released?
tatyana61 [14]
<span>The correct answer is posterior pituitary.</span>

ADH (AntiDiuretic Hormone) or Vasopressin is a peptide hormone which is produced in the hypothalamus. ADH is released from vesicles inside the cells of posterior pituitary into the circulation. ADH is released as a response of hyperosmolality of extracellular fluid. It increases the reabsorption of water in kidneys and constricts the blood vessels.

Oxytocin is also peptide hormone produced by the hypothalamus and released by the posterior pituitary. It has a role in sexual reproduction.

<span> </span>

3 0
3 years ago
In a forest ecosystem, a species of bird was introduced. The birds had few predators, and for a period of time its population ro
melamori03 [73]

Answer: d. The ecosystem reached its carrying capacity, and was not able to support continued population growth.

Explanation:

The carrying capacity can be defined as the maximum population size of the species that habitat or ecosystem can support or sustain on the basis of availability of food, water and other necessities. This is an important factor which keeps a balance of the population of a species in a particular region or ecosystem.

On the basis of the above information, The ecosystem reached its carrying capacity, and was not able to support continued population growth is the correct option to level off the rising populating of the birds.

8 0
3 years ago
Read 2 more answers
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