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501 questions in this collection · Page 8 of 51
Question 71 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The sheath enclosing the radicle and root cap in a monocot embryo is called:
At its lower end, the embryonal axis has the radical and root cap enclosed in an undifferentiated sheath called coleorrhiza.
Question 72 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Non-albuminous seeds are found in:
Non-albuminous seeds have no residual endosperm (e.g., pea, groundnut).
Question 73 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The micropyle in a seed facilitates the entry of:
The micropyle remains as a small pore in the seed coat. This facilitates entry of oxygen and water into the seed during germination.
Question 74 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The wall of the fruit developed from the ovary wall is called:
The wall of the ovary develops into the wall of fruit called pericarp.
Question 75 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Which of the following is a true fruit?
Apple, strawberry, and cashew are false fruits where the thalamus contributes. Most fruits (like Mango) develop only from the ovary and are true fruits.
Question 76 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
The 2000-year-old viable seed discovered at King Herod's palace was:
A recent record of 2000 years old viable seed is of the date palm, Phoenix dactylifera discovered during the archeological excavation at King Herod's palace.
Question 77 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Orchid fruits are characterized by containing:
Orchid fruits are one such category and each fruit contain thousands of tiny seeds.
Question 78 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
In apomixis, the diploid egg cell is formed without:
In some species, the diploid egg cell is formed without reduction division and develops into the embryo without fertilization.
Question 79 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
Nucellar polyembryony is a characteristic feature of:
More often, as in many Citrus and Mango varieties some of the nucellar cells... develop into the embryos.
Question 80 of 501
📘 CLASS XII
Sexual Reproduction In Flowering Plants
What is the main advantage of apomictic seeds to farmers?
If these hybrids are made into apomicts, there is no segregation of characters in the hybrid progeny. Then the farmers can keep on using the hybrid seeds.