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kumpel [21]
3 years ago
5

Which phyla do crinoids and sea cucumbers belong to?

Biology
1 answer:
lions [1.4K]3 years ago
7 0
Answer: phylum Echinodermata
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Which lobe of the cortex is Wernicke's area located in?
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Answer:

<h3>The answer to this question is the posterior superior temporal lobe.</h3>

Explanation:

<h3>The reason why is beacuse "Wernicke's area is a critical language area in the posterior superior temporal lobe connects to Broca's area via a neural pathway."</h3>
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3 years ago
Individuals who live in locations with limited exposure to sunlight can have abnormal bone development due to an inability to ab
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A. Cholecalciferol, or vitamin D3, is necessary for the normal absorption of calcium and phosphate ions. Vitamin D3 is made by cells in the epidermis due to exposure to sunlight. Without enough exposure to sunlight, the body won't produce enough vitamin D3

Explanation:

Hydroxyapetite  is the organic mineral  in  the bone that maintain  the  mechanical strengthening of the bone, by interacting with collagen fibres.  Calcium and Phosphate ions  are the two major components of this  bone materials. Generally 90%of bone is calcium , while 80% is phosphate.  Phosphate stimulate growth of  Oesteocytes. And the latter is important for bone mineralization. Together they maintain bone mineralization and maintenance,thereby preventing bone resorption.

Absorption of  Ca and P. into the blood stream to reach the bones cells is conducted by Vit D. Dietary supply is not the only route through which  Vit D get to the blood stream. Exposure of the skin to UVB rays of the early morning sunlight is another route.

Vitamin D plays major  role in absorption of Ca and P in the body.

Vit. D is  naturally synthesized in humans when the skin is exposed to  early morning sunlight  (UVB). It is usually produce in inactive forms,and undergoes hydroxylation( i.e addition of hydroxyl group -OH) in the liver to  be biologically active .

Its active forms acts on the epithelial cells of the intestinal wall to facilitate calcium absorption into the blood stream  to reach the bone cells .it also stimulate absorption of Phosphate.

Since these two minerals ensures, mechanical strength, prevention of bone resorption,  there availability in the bone must be maintained by Vit, D supply from exposure to sunlight.

,

7 0
3 years ago
Which province would be least likely to allow for extensive farming?
Fittoniya [83]

Which province would be least likely to allow for extensive farming?

ans :- The Blue Ridge Province isn't good for farming

3 0
2 years ago
The carbon cycle is a process that involves:
OLga [1]

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All of the above

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Carbon atoms are created during the process of photosynthesis. During this process, plants will absorb carbon dioxide and sunlight to create energy, glucose, and other sugars. And for the physical changes of carbon molecules, carbon can undertake multiple changes overtime. Even though this element can be stored in the Earth for millions of years, it can be transferred in seconds from one object to another

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2 years ago
Specialized cells differ from one another because they
Ede4ka [16]
A) only express certain genes
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