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neonofarm [45]
3 years ago
5

A botanist discovers a new species of land plant with a dominant sporophyte, chlorophylls a and b, and cell walls made of cellul

ose. In assigning this plant to a phylum, which of the following, if present, would be least useful?
a. endosperm
b. seeds
c. sperm that lack flagella
d. flowers
e. spores
Biology
1 answer:
olchik [2.2K]3 years ago
3 0

Answer:

e. spores

Explanation:

In the given question, the characteristics of a plant are mentioned which are the dominant sporophyte, cell wall and the Chl a or b.

It is mentioned that the plant has a dominant sporophyte therefore it produces the spores during its life cycle. The other features like the endosperm, seeds, flowers are the characteristics on the basis of which the plant can be characterised as they differ in the plants.

Since the production of spores is a characteristic feature of the sporophyte, therefore, it will be least considered by the botanist to discover a new species.

Thus, Option-E is the correct answer.

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As the semimajor axis of a planet increase, the orbital period will decrease and the speed of the planet will decrease.

<h3>What is Kepler's second law?</h3>

Kepler's second law of planetary motion describes the speed of a planet traveling in an elliptical orbit around the Sun.

This law exaplains the speed of planets around the sun, the speed of the planet increases as it nears the sun and decreases as it recedes from the sun.

From the findings, the astronomical unit of the Mercury is 0.387 and the orbital period is 0.24 year.

T \propto a^{3/2}

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From the equation above, as the semimajor axis of a planet increase, the orbital period will decrease and the speed of the planet will decrease.

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The phenomena of polygenic inheritance would have become a grievous fault to his investigation, if he had investigated human height instead of stem length of pea plants.

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The stem length or plant height depends on the single factor of allelic gene inheritance and expression in phenotype, making it simpler to trace down the division of meiosis and control the experiment as needed. Considering human height for a chance, may lead to uncontrolled condition of having next generation study as well as the time required to be long. Other factor was that the height is dependent not only on the height gene expression but is controlled by nutrition and environmental factors too.

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Answer:

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