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Consider the following statements and choose the correct answer:
1. Spores of pine are borne in cones
2. In pine, the sporophyte is the smaller generation and after germination is dependent
3. In pine, there are two kinds of spores - microspores and megaspores
4. The male gametophyte of pine is a dependent structure and is reduced to six cells
In a majority of flowering plants, out of the four megaspores, what is the ratio of functional and degenerate megaspores?
You do an activity involving germination of gram seeds with children where each child tries germination in different conditions (1) in the air only (2) in air and water (3) completely dipped underwater. The children enter the result in their notebook in a table, analyse and conclude that both air and water are required for germination. Which one of the skills children aren't exposed to?
Female rabbits are either juvenile or adult. Each month, each juvenile grows to adulthood and each adult female gives birth (on average) to one juvenile female. Starting with one juvenile female rabbit, how many female rabbits will there be after 10 months ?
The pie chart given below shows the number of female students in different subjects. The number of female students in a particular subject is shown as a percentage of a total number of female students in all the subjects together. If the total number of female students is 3600, then what is the difference in the number of female students in subjects S1 and S4?
Each question below is followed by two statements I and II. You have to determine whether the data given in the statements are sufficient for answering the question. You should use the data and your knowledge of Mathematics to choose the best possible answer. What is the average weight of new students added? I. In a class 60% students are male and there average weight is 15 kg more than the female students, 9 males and 6 new female students joined the class and the average weight of the class increased by 0.84 II. Total male students in the class is 12 more than female students adding 9 male students to the class increases the average weight of male students by 1 kg and adding 6 female students increases the average weight of female students by 0.6.
Which among the following is correct regarding male-female inter and intra-state migration in India as per Census-2011 data? 1. In intra-state migration, male outnumbers female in rural to urban migration 2. In inter-state migration, male outnumbers female in rural to urban migration 3. In intra-state migration, female outnumbers male in rural to rural migration 4. In inter-state migration, male outnumbers female in rural to rural migration
Consider the following statements regarding the germination of pollen grain and choose the correct answer:
1. The content of the pollen is a true male gametophyte
2. The pollen tube comes out due to the protrusion of the exine through the germ pore
3. When the pollen grain has germinated, the pollen tube penetrates the stigma through the stigmatic papillae
4. Some stigmas have a continuous cuticle in which pollen tubes penetrate by enzyme action
Which of the following statements refers to the process of 'parthenogenesis'? 1. It is a natural form of asexual reproduction in which the growth and development of embryos occur without fertilisation. 2. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg outside of the female's body. 3. It is a mode of reproduction in which a male organism's sperm fertilizes a female organism's egg inside of the female's body  Select the correct answer using the codes given below.
In the following question, sentences of a paragraph have been jumbled and labelled as A, B, C and D. You are required to rearrange the jumbled sentences of the paragraph and mark your response accordingly by selecting the correct option. A: The most common example of germination is the sprouting of a seedling from a seed. B: It is also the process of reactivation of the metabolic machinery of the seed. C: It is usually the growth of a plant contained within a seed; it results in the formation of the seedling.  D: Germination is the process by which an organism grows from a seed or similar structure.