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grin007 [14]
3 years ago
9

One reproductive adaptation that helped oviparous reptiles and birds survive the harsher conditions on land was the ____________

_________.
Biology
2 answers:
maxonik [38]3 years ago
4 0
The correct answer is the amniotic egg. Hope this helps.
tiny-mole [99]3 years ago
4 0

Answer:

Amniotic eggs.

Explanation:

Amniotic eggs are the eggs produced by the birds, reptiles and mammals. The embryo develops inside the amniotic egg. The shell of the egg is made of hard calcium elements.

The main function of the amniotic egg is to protect the embryo from the harsh dry conditions. The development of amniotic egg is the type of reproductive adaptation that are used for the protection of their embryo. The eggs can survive on the conditions of the land environment.

Thus, the answer is amniotic egg.

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The answer is stabilizing selection.

<span>Sickle-cell anemia is a recessive disorder caused by the presence of two recessive alleles "s", so genotype is "ss". This disorder is characterized by sickle hemoglobin. In an area with malaria, heterozygous individuals "Ss" (with one dominant allele and one recessive allele) have an advantage. These individuals will have both normal and sickle hemoglobin. But pathogen that causes malaria affect only normal hemoglobin, so heterozygous individuals will have half of the hemoglobin resistant to the pathogen and those individuals are resistant to malaria.</span>

Stabilizing selection favors heterozygotes Ss,  disruptive selection favors dominant (SS) and recessive (ss) homozygotes, while directional selection favors dominant (SS) or recessive (ss) homozygote. Since in this example, people with genotype Ss (heterozygotes) are in advantage, then this is an example of stabilizing selection.

7 0
3 years ago
What are Sulfas? How do they work?​
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Answer:

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plz mark me as brainliest :)

6 0
3 years ago
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alexdok [17]

Answer: Wet or dry environment.

Explanation:

<u>The independent variable is the variable that a researcher manipulates in an experiment in order to carry out a study on the incidence of the expression of the dependent variable.</u> Therefore, the independent variable is the one that changes or is controlled to see its effects on the dependent variable.

Researchers can then design a container with a wet or dry environment. But it's the pillbugs that are going to choose where to go and how long to spend in each part. So the time they spend in each part is a dependent variable since that cannot be controlled by the scientists conducting the experiment. Henceforth, the researches will just record this dependent variable without controlling it. But they can decide what to put in the container to make it wet or dry environment, or whatever they want to design. So wet or dry environment is the independent variable.

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3 years ago
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Sexual repro means combining  genetics from parents, while asexual repro produces an offspring from only one parent.

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2 years ago
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Why didn't the early geologic time scale include the number of years ago that events happened?
miss Akunina [59]

Answer:

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