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aksik [14]
3 years ago
14

Why is internal fertilization necessary in reptiles?

Biology
2 answers:
laila [671]3 years ago
5 0
In mammals, reptiles<span>, </span>birds<span>, and some types of fish the gametes meet inside of the female's body. This is called </span>internal fertilization<span>. All land dwellers need to </span>fertilize <span>this way because sperm still prefer swimming to walking.</span>
VladimirAG [237]3 years ago
4 0
Birds and reptiles evolved to lay shelled eggs that required fertilization to happen before the protective shell is formed. Internal Fertilization is one way to make this possible. Sperm, the male gamete, is a single cell with a flagellum that allows it to move or "swim" in fluids. Internal fertilization creates a contained environment in which the sperm can "swim" to the ovum, the female gamete.
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Answer:

The correct answer is case-control study.

Explanation:

In a case-control study, two groups of the population are used, in which one group is kept as control, and the other is known as the experimental group that encounters with a specific disease or an outcome. With the help of this study, one can expose the groups to various or single outcomes.  

In the given case, a study is done in which an advertisement on a ban on smoking is encouraged by the non-smokers at the alcohol sale points but not by smokers, in the process a random digit dialing method was used. This random digit dialing method is an illustration of a case-control study, in which the survey of the individuals is done regarding the ban on smoking.  

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3 years ago
A certain species of butterfly varies in color from white to dark blue. The birds found in the same area feed on the white or li
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Answer:

(c) directional selection

Explanation:

Directional selection is a type of natural selection that occurs when members of a population of a species with a particular extreme phenotype is selected or favored against the other phenotypes when natural forces act on the population of a species. Individuals having the particular traits that are favored survive and become more common that others with traits that are less favored.

Directional selection may likely result in the species of butterflies in which darkly collared butterflies are not preyed upon, ensuring their survival, while the other butterflies with other colors will be phased out with time. Darkly colored butterfly will be selected for while the others will be selected against.

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3 years ago
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Answer:

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