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Ivenika [448]
2 years ago
12

Which adaptation helps polar bears maintain a constant internal temperature (thermal homeostasis) in cold weather? three layers

of fur blubber finding shade underground white skin
Biology
2 answers:
lubasha [3.4K]2 years ago
5 0

Answer:

The polar bear is an animal which is prevalent in the arctic region of the world which is characterized by very cold icy climate.

They adapt to these climatic conditions by maintaining a body temperature of 37°C through its thick fur and tough skin. It also has an insulating fat layer (adipose tissues) which is very thick.

This insulation helps in keeping the animal very warm in extreme temperatures.

Gala2k [10]2 years ago
3 0

Answer:

white skin

Explanation:

 

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The closest relatives of fungi are thought to be the
Marat540 [252]

Answer:

Option (A)

Explanation:

Fungus are the unicellular eukaryotic living organisms that are so small that it cannot be seen with our naked eye. It plays a significant role in decomposing the dead plants, animals, and other organic matters. They are present in both terrestrial as well as the aquatic environment.

<u>Fungus are most closely related to the animals</u>, because they both have similar characteristics.  

Fungus cannot prepare their own food like animals and they are considered to be heterotrophic. They can reproduce by the means of spores and their cells are comprised of nuclei with various numbers of chromosomes. These are the first unicellular organisms on earth from which the evolutionary processes has taken place and formed the present day complex multi-cellular organisms.

Thus, the correct answer is option (A).

8 0
2 years ago
The average 70 kg (150 lb) being has 5.5 L of blood (1.05 g/mL). How many 1 oz drinks of 20% alcohol by volume (40 proof) must b
AlekseyPX

Answer:

The total blood given is 5.5 liters

Thus, total alcohol needed for BAC (blood alcohol content) to exceed 0.1 gram per 100 ml will be 0.1/100 × 5500 = 5.5 grams alcohol.

1 oz = 28.3 grams

28.3 gram water = 28.3 ml

It has 20 percent alcohol by volume,

Therefore, alcohol in one drink will be:

20/100 × 28.3

= 5.66 ml

= 5.66 × 0.79 (density of ethanol)

= 4.47 gram

Thus, no of drinks will be 5.5 g / 4.47 g = 1.2

Hence, 1.2 drinks will make the BAC to exceed 0.1 g / 100 ml in the blood.

4 0
1 year ago
Rose has just given birth to her son, Isaac, and claims that David is the father. David says that he cannot be the father, becau
elena-s [515]

Answer:

Since albinism is an autosomal recessive trait, it means that both parents must possess the gene for it, for the albinism to occur.

Thus, David could be the father if both Rose and David are carriers(heterozygotes) for the albino allele.

5 0
1 year ago
Which of the following is (are) true regarding the RDA?
oee [108]

Answer:

D. All of the above.

Explanation:

Recommended Dietary Allowance (RDA) is a term that refers to the amount of vitamins, minerals and protein that should be consumed daily to meet the nutritional needs of most individuals and groups of people in a healthy population. The RDA should be recommended by a nutritionist, in addition it is noteworthy that the RDA can be used as a guideline to provide nutritional adequacy for micronutrients and often the RDA values are different for men and women.

8 0
1 year ago
The ara operon is controlled by a regulator protein that exerts ________.
goblinko [34]

AraC protein certain to the ara operator works as a repressor that avoid transcription of the same ara operon and the araC gene AraC protein is an activator in the presence of arabinose and repressor in the absence of arabinose -With arabinose absent, the AraC protein stays as
a homodimer. One AraC protein put together to the ara initiator and the other protein now binds to a different regulatory site in DNA called the ara operator.

7 0
2 years ago
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