Which are the special proteins in muscles that contract and relax to cause movement?

 

Sexual reproduction in Algae that takes place through fusion of two dissimilar size gametes is called?

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

Photosynthesis fulfills which of the following requirements of the autotrophic organisms?

I. Carbon

II. Water

III. Energy

Features and habits that help animals to adapt to their surroundings are a result of the process of ______________.

Lymph carries digested and absorbed fat from ______.

Gaseous exchange takes place in leaves through tiny pores for the purpose of photosynthesis. What are these pores?

Animals in which the cells are arranged in two embryonic layers are called ________.

The female sex organs in a flower is the __________.