Photosynthesis — Biology STD 10 — Question

Stomata open during the day and close at night because :

Assertion (A): Mendel's law of segregation states that during the formation of gametes, the alleles segregate from each other so that each gamete carries only one allele for each gene.
Reason (R): This segregation of alleles occurs during anaphase I of meiosis.

Cell division by meiosis of a parent cell with 23 pairs of chromosomes will result in:

Which word describes an individual who has two identical alleles for a particular gene?

The word "tropic" is derived from a Greek word"tropos " which mainly indicates to:

The primary reason for increase in human population is:

Pancreas is a mixed gland in which:

Nuclear membrane reappears in ____________

Red blood cells are also called as erythrocytes. Cellular component of blood, millions of which in the circulation of vertebrates give the blood its characteristic colour and carry oxygen from the lungs to the tissues. The mature human red blood cell is small, round, and biconcave; it appears dumbbell-shaped in profile. The cell is flexible and assumes a bell shape as it passes through extremely small blood vessels. It is covered with a membrane composed of lipids and proteins, lacks a nucleus, and contains hemoglobin-a red ironrich protein that binds oxygen.
Answer the following questions in context to RBC.
(ii) The iron containing respiratory pigment present in red blood cells is: