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Doctors Medicines MCQs Q&A

Consider the following statements and choose the correct answer:
1. For the development of viable seeds the double fertilization is very necessary
2. The net result of double fertilization is the formation of endosperm from the triploid nucleus
3. In Angiosperms very free nuclear divisions take place as in Gymnosperms
4. The endosperm nucleus has both maternal and paternal characters showing physiological importance like hybrid vigour

Consider the following statements and choose the correct answer:
1. For the development of viable seeds the double fertilization is very necessary
2. The net result of double fertilization is the formation of endosperm from the triploid nucleus
3. In Angiosperms very free nuclear divisions take place as in Gymnosperms
4. The endosperm nucleus has both maternal and paternal characters showing physiological importance like hybrid vigour Correct Answer Only 1, 2 and 4 are true

Related Questions

Consider the following statements regarding Xenia and choose the correct answer:
1. If a white variety (yy) is pollinated with pollen from a yellow variety (YY), one of the male gametes (Y) will unite with the egg (y) to produce a hybrid embryo (Yy) which will act as a heterozygote for yellow endosperm in the next generation
2. The second male gamete (Y) will unite with the two polar nuclei (y, y) and produces the primary endosperm nucleus (Yyy) which is triploid
3. If a yellow endosperm variety (YY) is crossed with pollen from a white grained variety, the grains produced are white like the pollen parent
Consider the following statements: 1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction. 2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled. 3. In a nuclear reactor, all operating reactors are ‘critical’, while there is no question of ‘criticality’ in case of a nuclear bomb. 4. Nuclear reactors do not use moderators, while nuclear bombs use them. Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is / are correct?
Consider the following statements.
1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction.
2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled.
3. In a nuclear reactor, all operating reactors are 'critical', while there is no question of 'critically' in case of a nuclear bomb.
4. Nuclear reactors do not use moderators, while nuclear bombs use them.
Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is/are correct?
Consider the following statements regarding double fertilization and choose the correct answer:
1. At the time of the sperm's approach to the egg nucleus, the male nucleus has the appearance of a continuous thread rolled into a ball
2. It is only the presence of the two nucleoli which serves to distinguish the fertilized egg from the unfertilized egg
3. Finally, the male nucleolus increases in size and fuses with the female nucleolus thus closing the phenomenon of sexual union of the nuclei
4. The fusion of the male gamete with the secondary nucleus results in the formation of a sister embryo
Sue planted 4 times as many apple seeds as she planted orange seeds. 15% of the apple seeds grew into trees, and 10% of the orange seeds grew into trees. If a total of 420 apple trees and orange trees grew from the seeds, how many orange seeds did Sue plant?
A teacher along with his students is carrying out a study on germination of seeds. They take some dry seeds of different kinds and plant them in different physical conditions. They observe, measure and discuss the growth over a period of time. During the course of the activity, teacher asks questions which require various process skills. The questions asked by the teacher are given in column I Match these with the appropriate process skills   Column I   Column II (A) What are the differences between seeds of different type (i) communication (B) Why do you think some seeds are growing more quickly than others? (ii) predicting (C) Draw a diagram to depict the changes in the seeds (iii) observing (D) Based on your observation what do you think would happen if we double the amount of water (iv) hypothesising
Mr. Kumar's paternal grandfather has one son and no daughter. Mr. Kumar's daughter has two paternal aunts and three paternal uncles, Therefore, Mr. Kumar's paternal grandfather has what numbers of granddaughters and grandsons respectively?
Seeds are great travellers they can reach far and wide. Which of the following statements about seed dispersal is true? A. Animals eat apples and pass their seeds in their stool. B. Mangrove seeds disperse by water. C. Seeds of the orchid plant attach to animals using hooks. D. Soyabean seeds disperse by bursting.
Arrange the following statements in a logical sequence and select the right answers by using the code given below. A. But all political expression of social divisions need not be always dangerous. B. Social divisions of one kind or the other exist in most countries. C. Parties try to win political support by appealing to social divisions. D. Some social differences may result in social divisions.
Reema pointed towards a painting and said, ‘He is my son’s paternal grandfather’s only daughter-in-law’s father’s father’. How is he related to Reema? A. Paternal Uncle B. Paternal Grandfather C. Maternal Grandfather D. Father