P-1 Lenses — Science STD 10 — Question

What does a root do in response to light? What is this phenomenon known a?

Define sexual reproduction.

What are the laws of reflection?

Condensation of chromosomes : Prophase :: Formation of spindle fibres : …………

State one use of concave mirror based on the formation of image as in case (z) above.

Denatured ethanol is used as industrial solvent.

(double diplacement, decomposition)
When electric current is passed through acidulated water …….. of water takes place.

Tell me who am I? What is my class/ phylum?
1. My body is divided into proboscis, collar and trunk. I am marine animal.
2. I stay inside two shells. My body is divided into head, foot and visceral mass.
3. I am male as well as female. I am endoparasite having a coelomate and bilaterally symmetrical and flattened body.

Name a metal which is so soft that it can be cut with a knife.

Name the phenomenon which is made use of in an electric generator.