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deff fn [24]
3 years ago
13

Which are the three main adaptations that allowed reptiles to become independent from water?

Biology
1 answer:
m_a_m_a [10]3 years ago
8 0

Answer:

The three main adaptations that allowed reptiles to become independent from water are: Amniotic egg, Dry skin, Internal fertilization.

Explanation:

The class reptilia refers to all the creeping or crawling animals. Reptiles are the first true land vertebrates. They are cold blooded or poikilotherms. They exhibit several adaptations to survive on land. Reptiles along with birds and mammals are called amniotes (with amnion) whereas Pisces and amphibians are called anamniotes (without amnion). Amnion is an embryonic membrane which protects the embryo from drying out. Since reptiles are land vertebrates they lay amniotic eggs to prevent drying of embryo. Their body is covered by dry and cornified skin, epidermal scales or scutes to prevent loss of water from the body. In some fishes and amphibians the eggs are released into the water bodies and fertilization occur externally but in case of reptiles the fertilization is internal. The development is direct in reptiles.

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Which cell has a nuclues
malfutka [58]

Answer:

eukaryotic cell

Explanation:

theirs many organelle found in that type of call

4 0
4 years ago
Read 2 more answers
Suppose a population is carrying a condition controlled by two alleles: R (dominant) and r (recessive). Only homozygous individu
White raven [17]

<span><u>The answer is A. 72.25 percent.</u>

The Hardy-Weinberg principle can be used:</span>

<em>p² + 2pq + q² = 1</em> and <em>p + q = 1</em>

where <em>p</em> and <em>q</em> are the frequencies of the alleles, and <em>p²</em>, <em>q²</em> and <em>2pq </em>are the frequencies of the genotypes.

<span>The <em>r</em> allele (<em>q</em>) is found in 15% of the population:
q = 15% = 15/100
Thus, q = </span><span>0.15

To calculate the <em>R</em> allele frequency (<em>p</em>), the formula p + q = 1 is used:
If p + q = 1, then p = 1 - q
p = 1 - 0.15
Thus, </span><span>p = 0.85

Knowing the frequency of the <em>R</em> allele (<em>p</em>), it is easy to determine the frequency of the RR genotype (p²):
p² = 0.85² = 0.7225

Expressed in percentage, p² = 72.25%.</span>

4 0
3 years ago
why your 21st century sophisticated, how do you explain the role of the plant in the change of the air in the jar​
Yuliya22 [10]

Answer: The gas of Fire constrains the atoms that make up oxygen in the air. Plants release oxygen, and take in carbon dioxide.

6 0
3 years ago
The dental formula for both Old World and New World monkeys is the same as the dental pattern for tarsiers.
Snezhnost [94]

Answer:

b. false

Explanation:

Old world monkey and new world monkey do not have same dental formula . Dental formula is different for old world monkey as compare to new world monkey.

Old world monkey have 2.1.2.3 dental formula but on the other hand new world monkey have 2.1.3.3 dental formula .

Old world monkey have narrow nose but new world money have wide nose.Generally old world monkey are found in Asia and Africa that is why they called old world monkey.

5 0
3 years ago
what is the significance of diffusion and osmosis in living organism ?give one example in support of your answer​
olasank [31]

Answer:

Diffusion is the process in which molecules and ions move from a region of high concentration to low concentration. Its also how cells transport waste out of the cell and nutrients into it hence being very crucial. Diffusion also occurs without the expenditure of extra energy using a procedure known as passive transport. (Osmosis is a form of diffusion but deals with water exclusively).

Examples of where diffusion is important;

In the intestines - Digested food molecules such as amino acids and glucose move down the concentration gradient from the intestine into the bloodstream. Wastes such as carbon dioxide or urea travel via diffusion from the body's cells to the bloodstream.

Osmosis plays a major role in living organisms. It aids in the transportation of nutrients from cells to cells and also helps to remove the waste's metabolic products from the cell. The purification of blood in the kidneys is also dependent on the process of osmosis.

4 0
2 years ago
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