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The megaspore mother cell nucleus after dividing meiotically forms four haploid megaspores which are arranged in a linear tetrad, of which the lower most megaspore is functional in case of

Correct Answer: Polygonum type

Select the four statements about Plasmodium that are true. A)Inside an infected mosquito, haploid gametes fuse, forming a diploid zygote that develops into an oocyst B) Plasmodium cells infect two specific types of cells in humans. C) Inside an infected mosquito, haploid gametes fuse, forming a haploid zygote that develops into an oocyst. D) When a mosquito bites a human with malaria, diploid Plasmodium cells enter the mosquito. E) Plasmodium cells are transferred to humans through mosquito saliva. F) The life cycle of Plasmodium involves only haploid forms. G) The complete life cycle of Plasmodium requires two hosts.

In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?

From one megaspore mother cell number of megaspore finally produced is

Consider the following statements and choose the correct answer:
1. In Oenothera type of monosporic embryo sac, the embryo develops from the micropylar megaspore of the tetrad
2. Antipodal cells are altogether absent in Oenothera type
3. The genus Trapa forms an 8-nucleate embryo sac of the Polygonurn type
4. Oenothera type of embryo sac development has been found to be a characteristic feature of the entire family Onagraceae

Tetrad of megaspores is generally

In the following question the 1st and the last part of the sentence/passage are numbered 1 and 6. The rest of the sentence/ passage is split into fourparts and named P, Q, R and S. These four parts are not given in their proper order. Read the sentence/passage and find out which of the four combinations iscorrect. 1. "Mother do you love me?", she asked.
P. She then looked into her mother's tear-filled eyes out of impatience for a reply.
Q. She kept waiting but her mother did not speak.
R. Then, she understood what words the mother's eyes spoke and the reason for her silence.
S. She got no direct reply and grew restless.
6. She climbed slowly on to her mother's lap.

Study the following statements.
1. Control room of the cell is Nucleus.
2. Nucleus was discovered by Robert Brown.
3. Nuclear envelope is absent in bacteria.
Which of the statement(s) given above is/are correct about nucleus?

Which of the following best explain why the lower course of a river is sometimes choked with sediments?
1. The valley of a river is widest in its lower course.
2. The velocity of a river in its lower course is low.
3. The delta sometimes develops in a river's lower course.
4. Much of the river water is drawn for irrigation in the lower course.

What is the printout of the following switch statement?
char ch = 'a'; switch (ch){ case 'a': case 'A': System.out.print(ch); break; case 'b': case 'B': System.out.print(ch); break; case 'c': case 'C': System.out.print(ch); break; case 'd': case 'D': System.out.print(ch);}

Development of female gametophyte directly from megaspore mother cell without meiosis is called