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प्रश्न
Which of the following types require pollinator but the result is genetically similar to autogamy?
विकल्प
Geitonogamy
Xenogamy
Apogamy
Cleistogamy
उत्तर
Geitonogamy
Explanation:
It is functionally similar to cross-pollination as it involves pollinating agents, but it cannot bring about genetic variations and is only of ecological significance, e.g., Cucurbita maxima. It is similar to autogamy, as pollen grains come from the same plant.
संबंधित प्रश्न
Name the scientist who put forward the most popular model of DNA.
How does the amount of DNA remain constant though each new generation is a combination of DNA copies of two individuals?
Match items in Column I with those in Column II:
| Column I | Column II | ||
| (a) | Bud | (i) | Maple |
| (b) | Eyes | (ii) | Spirogyra |
| (c) | Fragmentation | (iii) | Yeast |
| (d) | Wings | (iv) | Bread mould |
| (e) | Spores | (v) | Potato |
| (vi) | Rose |
What is a clone? Why do offsprings formed by asexual reproduction exhibit remarkable similarity?
What is meant by reproduction?
Asexual reproduction is :
(a) a fusion of specialised cells
(b) a method by which all types of organisms reproduce
(c) a method producing genetically identical offspring
(d) a method in which more than one parent are involved
In the list of organisms given below, those which reproduce by the asexual method are :
(i) banana
(ii) yak
(iii) yeast
(iv) Amoeba
(a) (ii) and (iv)
(b) (i), (iii) and (iv)
(c) (i) and (iv)
(d) (ii), (iii) and (iv)
Name two animals which undergo external fertilisation.
Find the odd-one out, giving reason.
Gamete, budding, fragmentation, regeneration.
Why is reproduction necessary for living organisms?
Bryophyllum can reproduce by its ______.
Give reason for the following:
Vegetative propagation is practised for growing only some type of plants.
Multiple choice question.
In ovule, meiosis occurs in ______
Multiple choice question.
Which of these is the male reproductive organ in humans?
Which of the following is not a part of the uterus?
What is the function of inner cell mass?
Name two organisms that reproduce through budding.
Which of the following is diploid at the time of fertilization in a gametophyte of a normal angiosperm?
Identify the chromosome number of the endosperm in the following case. In an angiosperm a female plant having 2n = 24 is crossed with a male plant having 2n = 12.
Assertion and Reason types of Question.
Assertion: Corm is a condensed form of Bulb.
Reason: It has dry and fleshy scale leaves.
