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Tresset [83]
3 years ago
8

Human skin comes in a variety of

Biology
1 answer:
topjm [15]3 years ago
7 0

Answer:

Based on everything that you have learned so far, provide an explanation for how the different shades of skin color from pinkish white to dark brown evolved throughout human history. Darker skin colors evolved because they provided increased fitness in early human populations living in equatorial Africa.

Explanation:

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Describe what mammals faced in the quarternary period
VLD [36.1K]

These animals were preyed upon by equally large carnivores such as saber toothed cats, cave bears and dire wolves.

Btw it's (QUATERNARY) *

4 0
3 years ago
Read 2 more answers
At the molecular level, gene duplication often produces novelty in a lineage. This process provides another evolutionary pathway
alukav5142 [94]

Answer:

Bridgham et al. (2006) showed that the interaction between a steroid hormone (aldosterone-M) and its receptor (mineralocorticoid) evolved by Darwinian gradualism. In this work, the authors demonstrated  a primitive affinity between the hormone and its receptor that was initially present in chemically similar but more ancient ligands. This result has implications in understanding the association between gene duplication and the evolution of hormone signaling pathways. For example, in invertebrates, this work reinforces the importance of gene duplication in the existing interaction between paralogous glucocorticoid receptors and their receptor mineralocorticoid genes that were derived from duplication (Thornton 2001).

The publications above cited are the following:

J.T. Bridgham, S.M. Carroll, and J.W. Thornton (2006). Evolution of hormone-receptor complexity by molecular exploitation. Science, 312(5770), 97-101.

JW Thornton. Evolution of vertebrate steroid receptors from an ancestral estrogen receptor by ligand exploitation and serial genome expansions, Proc Natl Acad Sci USA (PNAS), 2001, vol. 98 10 (pg. 5671-5676).

6 0
2 years ago
Which of the following accurately describes the angiosperm plant life cycle?
scoundrel [369]
<span>C. The anther produces eggs. </span><span>

An angiosperm is a group of plants that consists of herbs, shrubs and trees. The angiosperms bear flowers and fruit. Its' seeds are not naked as they are covered by the fruit wall.
</span>

All angiosperms  produce flowers at some stage in their life. Flowers are important to the angiosperms  because they serve as the reproductive organ for the plant, providing a means for the plant to propagate itself. 

Angiosperms are the largest group of plants on earth. They account for approximately 80% of all known living plants. There are about 270,000 known species of angiosperms that live on the earth today.

3 0
3 years ago
A virus kills the host cell and explodes the virus out into the environment. What type of replication life cycle is this
tatuchka [14]

Answer:

Lytic

Explanation:

Brainly deleted my answer? The correct answer is Lytic. The type of replication life cycle is Lytic.

8 0
2 years ago
Once set up, solar energy is inexpensive to convert to a useful form, for every day use.
timama [110]

Answer:

Hey there!

The answer is true, making solar energy one of the most cost effective sources of energy.

Let me know if you need more help :)

3 0
3 years ago
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