Biology Questions

Involuntary actions in human beings such as blood pressure, salivation and vomiting are controlled by the

Which part of the human reproductive system helps the embryo get its nutrition from the mother's blood?

The group of crop plant that are vegetatively propagated is:

The richest source of Vitamin D from food is

___________ being a higher category, is the assemblage of families which exhibit a few similar characters.

_______ are chlorophyll-bearing, simple, thalloid, autotrophic and largely acquatic (both fresh water and marine) organisms.

Animals like annelids and arthropods etc where the body can be divided into identical left and right halves in only one plane, exhibit ________ symmetry.

The later (second) formed primary xylem elements are called _____________.