Light

Q.

In photosynthesis, the most useful colors of the light spectrum are

1. red, violet&blue

2. green, yellow, & orange

3. infrared, red, & yellow

4. red, white& blue

Q. Regarding the assertion and reason, choose the correct option:
Assertion [A]: Of the three major types of algae that exist underwater, red algae are found at the deepest range.
Reason [R]: The accessory pigment of red algae phycobilin can absorb blue light.

1. Both A and R are correct and R explains A
2. Both A and R are correct but R does not explain A
3. A is incorrect but R is correct
4. Both A and R are incorrect

Q. Which colour of visible light spectrum penetrates deepest into the ocean?

1. Green
2. Red
3. Blue
4. Violet

Q.

are there any defensive structure in earthworm.? if yes what are they