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3 years ago

Hair follicles are found in the layer of skin called the

Biology

2 answers:

kolezko [41]3 years ago

6 0

Answer:

Dermis

Explanation:

The hair follicles are present in the dermal papillae of the dermis layer. The dermal papillae are a series of triangular-shaped cells. The hair follicles are extending from the skin surface to the dermis layer of the skin. The hairs are the extension of the epidermis layer into the dermis layer of the muscle. The hair follicle has 2 parts, such as - the part which extends outside of the epidermis known as the shaft. The base of the follicle known as root. The hair follicle itself has different parts - outer root sheath, inner root sheath, and a centrally placed hair shaft. The erector muscles help in goosebumps of hair during cold.

saul85 [17]3 years ago

4 0

Answer:

option (B)

Explanation:

<u>Dermis is the layer of the skin that is composed of thick, irregular connecting tissues</u>. It gives the hardness and flexibility to the skin. This is the layer that is present between the epidermis and the subcutaneous layer. The tissues here are combined with the nerves and blood vessels. This contains the hair follicles that provide essential conditions for the better growth of hairs.

This dermis layer is divided into two layers, namely the papillary layer which presents the upper layer and the reticular layer that represents the lower layer.

thus, the correct answer is option (B).

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Aliun [14]

Answer: I am not totally sure but I would say the answer would be (D)

Explanation: Exposure to Diborane will not kill you or anything like that but it will most likely cause you to have a cough, shortness of breath (but not to bad), and eye/skin irritation.

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3 years ago

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Why do chicken eggs grow larger compared to other eggs?

Aloiza [94]

Answer:

Chicken eggs grow larger compared to other eggs due to their relative body sizes.

Explanation:

Egg laying and the size of an egg is relative to the size of the organism. So an ostrich lays a really large egg because it is a larger animal and can handle that size. Whereas a bluebird lays a small egg because it is a small bird.

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4 years ago

Describe the relationship<br> between variations and<br> adaptations?

laila [671]

Adaptations are physical or behavioral traits that make an organism better suited to its environment. Heritable variation comes from random mutations. Random mutations are the initial cause of new heritable traits. For example, a rabbit can't choose to have a different fur color.
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3 years ago

In a community, autotrophs generate 1,000 calories per hour of GPP and 500 calories per hour of NPP. Primary consumers convert 1

timama [110]

Answer:

Option B, 2 percent

Explanation:

Complete question is

In a community, autotrophs generate 1,000 calories per hour of GPP and 500 calories per hour of NPP. Primary consumers convert 10 calories per hour into their own biomass. What is the ecological efficiency in the link between autotrophs and primary consumers in this community?

1 percent

2 percent

20 percent

10 percent

Solution

Given

Autotrophs generating calories per hour of GPP $= 1000$

Autotrophs generating calories per hour of NPP $= 500$

The rate at which the primary consumers convert calories per hour into biomass is equal to $10$ calories per hour

The ecological efficiency is equal to" the rate of calorie conversion to biomass" divided by the net produced calories multiplied by $100$

Rearranging the above relation in a mathematical equation, we get -

$\frac{10}{500} * 100\\= 2$

Hence, option B is correct

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4 years ago

You perform the following dihybrid cross: A blaBx Ab/aB. The A and B genes control different traits. What phenotypic ratio would

Luda [366]

Answer:

Option-D

Explanation:

In the given question the genotype of parental allele is- AbaB X AbaB. The alleles formed will be- AB, Ab,aB, ab in which the crossover allele will be AB and ab.

1. Unlinked genes

Now of these alleles are unlinked then the alleles will assort independently of each other therefore performing the punnett square we will get dihybrid ratio as 9:3:3:1 in which

1. A_B_ are 9

2. aaB_ are 3

3. A_bb are-3

4. aabb- 1

Since the crossover allele are AB and ab therefore A_B_ are 9 and aabb- 1 represent recombinant genotype.

2. Linked genes

When the genes will be linked then chances of crossing over will be reduced as a result of which only two type of allele will be formed which are- Ab and aB and the recombinant frequency will become less.

Crossing these allele will form Aabb , AaBb , AaBb and aaBB genotypes. The recombinant ratio will decrease as A_B_ is 2 and aabb is not present.

Thus, option-4 which states that the unlinked ration is 9:3:3:1 and linked ratio is <9: >3: >3: <1 is correct.

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3 years ago