Light

Q. Which are the colours a butterfly can perceive?

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

Q. Photosynthetic plants absorb light of wavelength red and blue and reflect green light. hence they appear green in colour. Why do some photosynthetic plants have other colours

Q.

Which of the following animals prefer being in dark places?

1. Centipedes

2. Millipedes

3. Grasshoppers

4. Earthworms

Q.

In the absence of light, green leaves turn into ___ colour.

1. Purple

2. Dark Orange

3. Yellow

4. Red

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 take in 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. Mangroves are

1. Xerophytes
2. Hydrophytes
3. Halophytes
4. Glycophytes

Q. Look at the following image, and name the types of algae that would be found at each depth:

1. 150-200m - Brown algae; 100-150m - Green algae; 50-100m - Red algae
   
   
2. 150-200m - Red algae; 100-150m - Brown algae; 50-100m - Green algae
3. 150-200m - Green algae; 100-150m - Red algae; 50-100m - Brown algae
4. 150-200m - Brown algae; 100-150m - Red algae; 50-100m - Green algae