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4 years ago

What terms includes all the biotic and abiotic elements in an area?

Biology

2 answers:

Travka [436]4 years ago

8 0

Answer:

Ecosystem

Explanation:

Just took the test on edgenuity

bogdanovich [222]4 years ago

7 0

Ecosystem

Ecosystem refers to the community made up of all the living organisms (biotic component), their physical environment and all their interactions in a given space.

The biotic and abiotic components of the ecosystem are linked with the help of energy flows and nutrient cycles.

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X-rays are used during all of the following tests except

notka56 [123]

Answer:

The answer is B

Explanation:

because magnetic resonance imaging is a form of medical imaging that measures the response of the atomic nuclei of body tissues to high-frequency radio waves when placed in a strong magnetic field, and that produces images of the internal organs.

4 0

3 years ago

Generally, what is the result of the negative feedback process?.

NemiM [27]

Answer:

maintain homeostasis

Explanation:

4 0

2 years ago

A pure-breeding fruit fly with curled wings mates with a pure-breeding fruit fly with normal (straight) wings. The F1 mate with

vesna_86 [32]

Answer:

The dominant curled wing allele is also a recessive lethal.

Explanation:

If we look at the F2 ratio we see that :

curled wings: straight wings= 160:80

=2:1

Hence, if curled wings is considered to be a dominant trait then Curled wings * straight wings

Dd x dd

Punnet square will be as follows :

d d

D | Dd | Dd

d | Dd | dd

Hence in order to get F2

Dd x dd

Punnet square will be the same as above if the F1 cross is Dd* Dd

D d

D DD Dd

d Dd dd

if DD is lethal then the ratio is

Dd:dd=2:1

that is curled wings: straight wings=2:1

Hence, The dominant curled wing allele is also a recessive lethal.

6 0

4 years ago

How do the thyroid and parathyroid from a feedback loop?

shtirl [24]

Explanation:

When calcium levels in the blood become too low, parathyroid hormone leads to an increase in calcium by degrading bone. In response, calcitonin from the thyroid is released when the levels are high again, to decrease calcium levels in the blood.

Further Explanation:

During homeostasis the body maintains a constant internal balance in pH, temperature, blood pressure etc. Cells in a multicellular organism become specialized for particular tasks and communicate with one another in order to maintain homeostasis. Within the human body these are known as hormone cascades, where several complex steps occur- the tissues signal to one another with the use of hormones released by the endocrine system. The regulation (increase and decrease) of these secretions is achieved by negative feedback loops, where the release of certain substances during a cascade in turn halts the secretion of hormones at earlier stages.

In the body calcium homeostasis, which is generally defined as the maintenance of specific internal conditions, is mediated by the endocrine system through hormonal control. This regulates the calcium flux between the bloodstream and the bone; and the hormones responsible, change the ratio of osteoclast activity to osteoblast activity -osteoblasts build bone while osteoclasts breakdown or degrade bone.

Hormones responsible include calcitonin (from special parafollicular cells in the thyroid gland), calcitriol (activated vitamin D) and the parathyroid hormone (from the parathyroid glands). These affect the absorption of calcium from the gut, or kidney reabsorption; both parathyroid hormone and calcitriol act by causing the increase of calcium ions into the bloodstream as the bone is degraded by osteoclasts.

Learn more about tissue types at brainly.com/question/8487952

Learn more about homeostasis at brainly.com/question/1601808

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