Biology GK · all questions

Plant Anatomy and Physiology
practice.

Practice every MCQ with options. Use Show answers when you want the correct option and solution.

999

Questions

8/50

Page

Pick an option on a question to see the right answer and solution.

Q141

In which of the following stone fruits, when crosses are made where the early ripening varieties are taken as female parents, the developed embryos are abortive and seeds are not formed?

Select an option to see the answer and solution.

Q142

Small bead-like structures inside the ovary of a flower are called

Select an option to see the answer and solution.

Q143

Which one of the following statements is correct?

Select an option to see the answer and solution.

Q144

Apples are generally wrapped in waxed paper to

Select an option to see the answer and solution.

Q145

Consider the following statements regarding xerophytes and choose the correct answer:
1. The root system is very well developed in proportion to the shoot
2. In plants, such as Agave, the cells of mesophyll are very loosely packed
3. In majority of xerophytes the leaves are thick, fleshy with water storage tissue
4. In Opuntia, the function of photosynthesis is taken up by the stem itself

Select an option to see the answer and solution.

Q146

Consider the following statements and choose the correct answer:
1. The process of soil formation is so slow that soil may be considered as a non-renewable resource
2. Soil pollution may be the direct effect of dumping and disposal of wastes, application of agrochemicals or the indirect result of air pollution
3. Pesticides increase the population and number of species of living organisms which facilitate the structure and fertility of the soil
4. Several pesticides or their degradations are absorbed by the plants

Select an option to see the answer and solution.

Q147

Assertion (A) Hormones are also called growth adjusters.
Reason (R) Hormones promote or inhibit plant growth.

Select an option to see the answer and solution.

Q148

Water will move out of the plant instead of being absorbed if

Select an option to see the answer and solution.

Q149

IAA was first isolated from

Select an option to see the answer and solution.

Q150

The energy in a quantum may be determined from the wavelength of radiation, the energy being greater

Select an option to see the answer and solution.

Q151

Agrosan GN, Ceresan and Tillex give perfect control to seed-borne diseases, like

Select an option to see the answer and solution.

Q152

In the microspores, at certain places, the exine remains unthickened or missing and these places are known as

Select an option to see the answer and solution.

Q153

Most of the oxygen on earth is produced by

Select an option to see the answer and solution.

Q154

There is a complete absence of amphibians in which of the following biomes?

Select an option to see the answer and solution.

Q155

A body that changes position in the cell or plant organ or part as a direct consequence of the change in direction of the axis of an organ with reference to the direction of the force of gravity is called as

Select an option to see the answer and solution.

Q156

The highest concentrations of auxin are found in the

Select an option to see the answer and solution.

Q157

Consider the following statements and choose the correct answer:
1. The ecosystem is a major ecological unit
2. The function of ecosystem is related to the flow of energy and the cycling of materials through the structural components of the ecosystem
3. The major functional unit of the ecosystem is the population
4. The ecosystem has historical aspects: the present is related to the past, and the future is related to the present

Select an option to see the answer and solution.

Q158

Puccinia is a parasitic

Select an option to see the answer and solution.

Q159

The steps of dark reactions are

Select an option to see the answer and solution.

Q160

Which of the following is known as a dormancy phytohormone?

Select an option to see the answer and solution.

Prev 6 7 8 9 10 Next