Producing an orienting response in relation to some environmental response so that the organism gets itself into favourable conditions is known as
Select an option to see the answer and solution.
Biology GK · all questionsPlant Anatomy and Physiology
Plant Anatomy and Physiology
practice.
Practice every MCQ with options. Use Show answers when you want the correct option and solution.
999
Questions
5/50
Page
Pick an option on a question to see the right answer and solution.
Assertion (A) Leguminous plants are nitrogen fixers.
Reason (R) Leguminous plants have Rhizobium in their root nodules.
Reason (R) Leguminous plants have Rhizobium in their root nodules.
Select an option to see the answer and solution.
Match List-I (Embryo types) with List-II (Contributions of proembryonal cells) and select the correct answer:
| List-I | List-II |
| a. Onagrad type | 1. The basal and terminal cells, both contribute to the development of the embryo |
| b. Solanad type | 2. The basal cell undergoes no further division and the suspensor, if present, is always derived from the terminal cell |
| c. Asterad type | 3. The basal cell plays only a minor role or none in the subsequent development of the embryo |
| d. Caryophyllad type | 4. The basal cell usually forms a suspensor of two or more cells |
Select an option to see the answer and solution.
The in vivo synthesis of the purine ring of cytokinin takes place on
Select an option to see the answer and solution.
The examples of hypogeal germination are the seeds of
Select an option to see the answer and solution.
A mixture of the cytokinin 6-benzyladenine and GA4 and GA7 forms
Select an option to see the answer and solution.
The term taiga is applied to the
Select an option to see the answer and solution.
According to Addicott and Lynch, the most important factor controlling abscission is the condition of the
Select an option to see the answer and solution.
Which of the following is capable of reversing the light-break effect of red light?
Select an option to see the answer and solution.
Match List-I (Species) with List-II (Specialised epiphytic characters) and select the correct answer:
| List-I | List-II |
| a. Ficus ramentaceae | 1. Rootless |
| b. Asplenium nidus | 2. Almost entirely green roots |
| c. Tillandsia usneoides | 3. Coracious and thick leaves |
| d. Polyrrhiza funalis | 4. Pocket leaves |
Select an option to see the answer and solution.
The examples of synthetic auxins include
Select an option to see the answer and solution.
Gravitational, adsorptive, and hydrostatic forces that hold water to the soil are described as
Select an option to see the answer and solution.
Which of the following states of energy level is used in photosynthesis by green plants?
Select an option to see the answer and solution.
'Hot deserts' of the world include
Select an option to see the answer and solution.
Which of the following are the only spores in the life cycle of Puccinia gramini which can re-infect the host plant on which they are produced ?
Select an option to see the answer and solution.
Which one of the following is an insectivorous plant?
Select an option to see the answer and solution.
The existence of persistent rhythms in plants was first observed by
Select an option to see the answer and solution.
Which of the following is a parthenocarpic fruit?
Select an option to see the answer and solution.
In photosynthetic bacteria all the pigments and enzymes necessary for photosynthesis are located in
Select an option to see the answer and solution.
Q100
Open questionWhich of the following toxic substances are known as "photochemical smog"?
Select an option to see the answer and solution.