Biology GK · all questions

Plant Anatomy and Physiology
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Q881

Which of the following plants have the capacity to endure long desiccation?

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Q882

The downy mildews are all

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Q883

In which of the following genera the synergids of the embryo sac degenerate even before the entry of the pollen tube?

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Q884

Who among the following were the first to use antibiotics for the control of bacterial diseases?

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Q885

The vegetation of savannahs has which of the following resting periods?

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Q886

During the development of embryo in dicotyledons, the suspensor cell situated at the terminal end of suspensor in contact with the globular proembryo is called

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Q887

At the chalazal end, which of the following structures separates the synergids from the central cell?

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Q888

The reagent used to test the presence of starch in leaves is

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Q889

When microstands are intermixed without any pattern then the mass of vegetation together constitute a/an

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Q890

The turgor pressure is counter balanced by an equal and opposite pressure of the membrane on the enclosed solution, known as

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Q891

Match List-I (Enzymes) with List-II (Reactions) and select the correct answer:

List-I	List-II
a. Oxidoreductases	1. Synthesis by condensation of two groups requiring ATP
b. Lyases	2. Oxidation-reduction reaction
c. Transferases	3. Addition or loss of groups to double bonds
d. Ligases	4. Group transfer reactions

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Q892

Temperature required for vernalisation is

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Q893

In plants water is absorbed by the root hairs by a process called

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Q894

The stage of plasmolysis at which the first sign of shrinkage of cell contents from cell wall becomes detectable is called

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Q895

The process of development of asexual embryos directly from egg, antipodal cell, nucellus or integument is called

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Q896

Match List-I with List-II and select the correct answer:

List-I	List-II
a. Aristotle and Theophrastus	1. Identified the pure air as oxygen and noxious air produced by the burning of candle as carbon dioxide
b. Lavoisier	2. Performed experiments and demonstrated that the main function of chloroplast is to photo-oxidize water
c. Robert Hill	3. Demonstrated that some bacteria use H₂S instead of H₂O in the process of photosynthesis
d. Van Niel	4. Believed that plants absorb all their nourishment inorganic and organic directly from the soil

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Q897

The symptoms of calcium deficiency in plants include:

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Q898

Some of the physiological processes influenced by ethylene include

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Q899

Which one of the following is active transport?

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Q900

The response of buds to photoperiodism is actually controlled by

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