Plant Anatomy and Physiology MCQ question and answer with solution | Biology Gk MCQs

The type of apomixis, where the embryo sac develops from any cell of the archesporium is known as

The age of trees is determined by its

Soon after fertilization, the fertilized egg or oospore greatly enlarges in size and divides transversely to form a

Consider the following statements and choose the correct answer:
1. Hygroscopicity may be defined as the power of solids to adsorb water upon their surface
2. A finely divided soil holds less amount of water drawn from below than a soil with larger particles
3. Water held by capillary action is influenced by gravity
4. The gravitational water is that surplus of water which, after rain, gradually sinks downward, under the influence of gravity

The portion of the axis between radicle and the point of attachment of the cotyledons to the axis is called the

Common air pollutants that affect man and vegetation include

The extremities of organism like tail, ears and legs of mammals often appear to be shorter in colder climate, according to

Which of the following is a common example of biodegradable pollutants?

A mutant of com, called dwarf-5, which due to a single gene mutation, appears to be expressed phenotypically because of a deficiency of

Consider the following statements regarding the importance of diffusion and choose the correct answer:
1. The exchange of gases takes place by the principle of dependent diffusion
2. The process of diffusion is involved in transpiration of water vapours
3. The ions are absorbed by the simple diffusion during passive salt uptake
4. Diffusion is an effective means of transport of substances over a very short distance and helps in the translocation of food materials