Light

Q. Among the red, green and brown algae that inhabit the sea, which is likely to be found in the deepest waters? Why?

Q.

The Reserve Food Material Of Algae is:

1. Fat

2. Starch

3. sugar

4. Glycogen

Q. Consider the following statements regarding the
major pigments and stored food in the different
groups of algae and choose the correct option

(i) In chlorophyceae, the stored food material is starch and the major pigments are chlorophyll a and d.

(ii) In phaeophyceae, laminarin is the stored food and major pigments are chlorophyll a and b.

(iii) In rhodophyceae, floridean starch is the stored food and the major pigments are chlorophyll a, d and phycoerythrin

1. (i) is correct, but (ii) and (iii) are incorrec
2. (i) and (ii) are correct, but (iii) is incorrec
3. (i) and (iii) are correct, but (ii) is incorrec
4. (iii) is correct, but (i) and (ii) are incorrect

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

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

Q.

Why are euglena called mixotrophs?

Q.

Are algae alive?

Q. Match the types of algae in column A to their respective pigments in column B:
$\begin{array}{cc}ColumnA& ColumnB\\ p.Greenalgae& i.Chlorophyll\\ q.Redalgae& ii.Fucoxanthin\\ r.Brownalgae& iii.Phycobilin\end{array}$

1. p-i, q-ii, r-iii
2. p-i, q-iii, r-ii
3. p-iii, q-i, r-ii
4. p-ii, q-iii, r-i

Q. Match the types of algae in column A to their respective pigments in column B:
$\begin{array}{cc}ColumnA& ColumnB\\ p.Greenalgae& i.Chlorophyll\\ q.Redalgae& ii.Fucoxanthin\\ r.Brownalgae& iii.Phycobilin\end{array}$

1. p-i, q-ii, r-iii
2. p-i, q-iii, r-ii
3. p-iii, q-i, r-ii
4. p-ii, q-iii, r-i

Q. The following image shows the penetration capacity of different colours of visible light in open ocean and coastal waters.

Name the types of algae that would be found at each depth:

1. 150-200m - Brown algae
   100-150m - Green algae
   0-50m - Red algae
2. 150-200m - Red algae
   100-150m - Brown algae
   0-50m - 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

Q. Match the types of algae in column A to their respective pigments in column B:
$\begin{array}{cc}ColumnA& ColumnB\\ p.Greenalgae& i.Chlorophyll\\ q.Redalgae& ii.Fucoxanthin\\ r.Brownalgae& iii.Phycobilin\end{array}$

1. p-i, q-ii, r-iii
2. p-iii, q-i, r-ii
3. p-i, q-iii, r-ii
4. p-ii, q-iii, r-i

Q. The following image shows the penetration capacity of different colours of visible light in open ocean and coastal waters.

Name the types of algae that would be found at each depth:

1. 150-200m - Brown algae
   100-150m - Green algae
   0-50m - Red algae
2. 150-200m - Red algae
   100-150m - Brown algae
   0-50m - 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

Q. Match the following and select the correct option.

Column I	Column II	Column III
1. Green algae	A. Chl-a and b	i. Gelidium
2. Brown algae	B. Chl-a and d	ii. Fucus
3. Red algae	C. Chl-a and c	iii. Chara

1. 1-A-iii, 2-C-ii, 3-B-i
2. 1-A-ii, 2-C-iii, 3-B-i
3. 1-C-iii, 2-A-ii, 3-B-i
4. 1-B-i, 2-C-ii, 3-A-iii

Q. Main function of phorphyrin pigment present in earthworm

1. Help in respiration
2. Helps in reproduction
3. Protection from adverse effects of sun
4. Makes the worm beautiful

Q.

WHICH OF THE RED , BROWN, GREEN ALGAE IS LIKILY TO BE FOUND INSIDE THE OCEAN ?? GIVE REASON.

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

Q. Algae which are commonly found in the depths of oceans

1. Environmental resistance
2. Biotic potential
3. Fecundity
4. Morbidity