P-1 Carbon Compounds — Science STD 10 — Question

The earth takes ………… days to revolve around the Sun.

__________ is a constant known as universal gravitational constant.

Fill in the following blanks with suitable words:
The_______ chromosomes for a______ are XX whereas that for a______are XY.

Fill in the following blank with a suitable word:
A ray of light which is parallel to the principal axis of a convex mirror, appears to be coming from ______ after reflection from the mirror.

Fill in the following blanks:
Sodium hydrogen carbonate is ___________ soda whereas sodium carbonate is __________.

When the potential difference between two terminals becomes ………… the electric current stops flowing.

When the ray of light passes from denser medium to rarer medium obliquely, it bends __________ the normal.

If the body cavity is absent, the animal is called __________ .acellular/acoelomate

_________occurs in formatic cells and stem cells of the body.

The First human-like animals with erect posture evolved about…………..years ago.