A) Cleistogamy B) Apogamy C) Xenogamy D) Geitonogamy Answer:D) Geitonogamy Explanation: Geitonogamy refers to the transfer of pollen from one... View Article
A) three sperms B) single sperm and two vegetative cells C) single sperm and a vegetative cell D) two sperms and a vegetative cell Answer:D)... View Article
A) degenerated nucellus B) innermost layers of the seed coat C) free nuclear endosperm D) immature embryo Answer:C) free nuclear endosperm... View Article
A) thalamus or petal B) placenta C) connective D) anther Answer:A) thalamus or petal Explanation: The proximal end of the filament of stamen is... View Article
A) Some reptiles have also been reported as pollinators in some plant species B) Pollen germination and pollen tube growth are regulated by... View Article
A) insects or wind B) water C) bats D) birds Answer:A) insects or wind Explanation: In most aquatic plants, flowers grow out of the water and... View Article
A) there are numerous antipodal cells B) egg has a filiform apparatus C) a small central cell is present in that embryo sac D) reduction... View Article
A) hydrophily B) entomophily C) anemophily D) cleistogamy Answer:B) entomophily Explanation: Entomophily refers to the pollination by insects.... View Article
A) embryo sac B) endosperm C) ovule D) embryo Answer:A) embryo sac Explanation: The megaspore mother cell (MMC) in the megasporangium (ovule)... View Article
A metaphase chromosome is ideal to study the chromosome structure as it becomes thick and short due to condensation. A chromosome at metaphase is... View Article
During fertilization, random fusion of gametes occurs. For instance, when sperm with 22A+X fuses with the egg which has 22A+X, the zygote will... View Article
Y chromosome is the sex chromosome found only in males. It is acrocentric and measures about 2 mm in length. However, this chromosome displays... View Article
Trisomics are classified as primary, secondary and tertiary trisomics. Primary trisomic is the one with the extra chromosome being normal in... View Article
It is synthesized by plant cells and stored in different parts of the plant body. They are in the form of carbohydrates, oils, fats and proteins.... View Article