Pollution — Biology STD 10 — Question

A chromosome is composed of 50 % DNA and 50% ________.

TJThe _______ is referred to as the graveyard of red blood corpuscles and the _______ referred to as the cradle of red blood corpuscles.

Name the process by which molecules distribute themselves evenly within the space they occupy ______ 

Land plants obtain their carbon dioxide from the ______.

The fluid in the space between the tissue cell is called, ____________ .

During Telophase I of meiosis cell division, each chromosomes, consisting of two ______ (i) ______ reach the opposite poles of the cell. The ______(ii) ______ envelope begins to reform around these chromosome clusters. Meanwhile, the cell starts to ______ (iii) ______ preparing for its division into two cells. This stage is crucial as it marks the end of the first ______ (iv) ______ division, setting the stage for ______ (v) ______ where the cell actually divides into two new cells.

Nervous system and ____________ are very closely related.

The heart is made up of special muscles known as ____________ muscles.

Given below is certain structure. Write against them its functional acivity. 
Olfactory nerve and ……………..

Active transport is one in which the ions outside the roots are ___________.