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Bess [88]
2 years ago
13

Life- history evolution in guppies (Poecilia reticulata: Poecilii- dae). IV. Parallelism in life-history phenotypes.

Biology
1 answer:
Phantasy [73]2 years ago
6 0

The guppies evolved at a rate between 3700 and 45,000 Darwin's. For comparison, artificial-selection experiments on mice show rates of up to 200,000 Darwin's while most rates measured in the fossil record are only 0.1 to 1.0 Darwin.

Guppies introduced to a low-predation environment adapted to their new environment by producing larger and fewer offspring with each reproductive cycle. No such adaptation was seen in guppies that colonized a high-predation

With each generation, more guppies passed on the gene for small spots to their offspring. The rocks became smaller. More guppies with small spots survived long enough to pass on the gene for small spots to their offspring the rocks became smaller.

To learn more about guppies, here

brainly.com/question/12039135

#SPJ4

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HELP ME !!!!HELP ME PLEASE
postnew [5]

Answer:

Abiotic is basically a non living factor so the answer is

D. Sunlight, temperature , conductivity, dissolved oxygen.

All other options contain one biotic or living factor like algae, star fish and crabs these aren't Abiotic.

3 0
3 years ago
Which pair of terms could be used to describe the location of the nose when compared to the location of the eyes
stiv31 [10]

The pair of terms used to describe the location of the nose

when compared to the location of the eyes are medial and

inferior.

<h3>What is Location?</h3>

Location refers to the exact position of a particular object or

organism. In humans, location of different parts of the body

varies.

The location of the nose is medial to the eyes which means it is

found in the mid-line region of the eyes. The nose is also

inferior to the eyes as it is found in the lower region of where

the eye is located.

Read more about Location here brainly.com/question/1401793

6 0
2 years ago
The _______ is the total number of organisms that an ecosystem can support.
attashe74 [19]
Under natural conditions, most populations will stabilize at a level known as the carrying capacity of the ecosystem<span>. The carrying capacity is the maximum </span>number of organisms that an ecosystem can support<span> on a continued basis.</span>
5 0
3 years ago
Read 2 more answers
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Dmitry_Shevchenko [17]

Incomplete dominance

5 0
3 years ago
The most important factor in decreasing the intracellular concentration of calcium ion after contraction is
Veseljchak [2.6K]

Answer:

Active transport of calcium into the sarcoplasmic reticulum.

Explanation:

  • The sarcoplasmic reticulum (SR) is a membrane-bound structure found within muscle cells that is similar to the endoplasmic reticulum in other cells. The main function of the SR is to store calcium ions (Ca2+)
  • In response to an action potential traveling along the t tubule, voltage-sensitive proteins change shape, opening calcium channels in the adjacent terminal cisterns of the sarcoplasmic reticulum.
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