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earnstyle [38]
3 years ago
11

How do you think the density of ice affects the survival of water dwelling organisms in environments where temperatures fall bel

ow the freezing point?
Biology
1 answer:
aleksley [76]3 years ago
3 0

Water at 4 degrees centigrade has the highest density of all other water temperatures. This is why ice (whose temperature is below 0 degrees) floats on very cold water. This phenomenon is significant in the Artic and Antarctic where ice shelves float on cold ocean waters in the poles. Animals that live in these regions (such as seals and polar bears) use these ice shelves as hunting platforms.

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Name a hormone secreted by the thyroid gland that acts to lower blood calcium
Sergio [31]

Answer:

Thyrocalcitonin or TCT

Explanation:

Thyrocalcitonin or TCT is a non-iodinated calcium lowering hormone. It is originating from the parafollicular cells or C cells (C for calcium).  

The thyroid gland consists of follicles of cuboidal epithelial cells. These cuboidal cells have a nucleus at the base. These are principal cells responsible for the synthesis of thyroid hormones.

 In between these follicular cells, other high cuboidal cells are present, known as parafollicular cells / C cells. These cells synthesise the hormone TCT. When there is high levels of calcium ions in the serum, TCT will release. This lowers the high level of calcium ions in the blood and plasma to normal level. This is done due to the deposition of calcium in the bone.

4 0
3 years ago
A funnel-shaped passageway connecting the nasal and oral cavities to the "voice box".
posledela

Answer:

c. The pharynx

Explanation:

The pharynx is a tubular organ that begins in the funnel-shaped neck down the neck, extending from 12 to 15 cm in length and about 35 mm at its onset and about 15 mm at the end. its ending. It has communication with the esophagus, nasal passages and the ears. The pharynx is located behind the nasal passages and in front of the cervical vertebrae, remains attached to the larynx and esophagus.

Simply put, we can say that the pharynx is a funnel-shaped passageway that connects the nasal and oral cavities to the "voice box," also known as the larynx.

4 0
3 years ago
Question 32 ribosomes carry out dna-directed protein synthesis. carry out rna processing are not found in prokaryotes. of mitoch
Tom [10]
The answer is the Ribosomes of mitochondria and plastids are very similar in their structure and function to bacterial ribosomes.Mitochondria, chloroplasts, and bacteria are alike in size. Bacteria also have DNA and ribosomes alike to those of mitochondria and chloroplasts. Based on this and other proof, experts ponder host cells and bacteria shaped endosymbiotic relationships precedent, when separate host cells took in oxygen-using and photosynthetic bacteria but did not put an end to them.
6 0
3 years ago
Does the fossil record disprove evolution?
12345 [234]
No it supports it by showing homologous structural traits
6 0
3 years ago
The activity of the kidneys is controlled by hormones and by ?
Klio2033 [76]
The kidneys is controlled by hormones and by the composition of the urine since the hormone released is called ADH which is produced by the pituitary gland.
7 0
3 years ago
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