Select the correct sequence of steps involved in respiration
a. Transport of gases by blood
b. Pulmonary ventilation by which atmospheric air is drawn in and CO2 rich alveolar air is released out
c. Diffusion of O2 and CO2 between blood and tissues
d. Diffusion of gases across alveolar membrane
Factors affecting the rate of diffusion of gases between alveoli and blood is
Simplest type of sexual reproduction in which there is fusion of two gametes of opposite sex to form a diploid zygote is
Fusion of two gametes which are similar in size, either flagellated or non-flagellated is termed as ______ and seen in ______.
In pteridophytes, fusion of gametes takes place in