Male gemetes are flagellated in :
Vascular bundles in monocotyledons are consideredclosed because:
When you hold your breath, which of the followinggas changes in blood would first lead to the urge tobreathe?
Blood pressure in the mammalian aorta ismaximum during :
Which is the most common mechanism of geneticvariation in the population of sexually reproducingorganism?
Erythropoiesis starts in :