Life of Algae Underwater & Chlorophyll/accessory pigments

Question 1

Where do MOST algae live?

Answer 1

under water

Question 2

How do algae living UNDERWATER adapt DIFFERENTLY from land plants?

Answer 2

1. don’t need protection from DRYING out
   A: most algae have THIN (2 cells thick) leaflike structures that lack waterproof covering
   B: structures can exchange Oxygen, Carbon dioxide, and nutrients directly with the water around them
2. Supported by WATER, don’t need STEM-LIKE structure to keep them from falling over
3. Sexual Reproduction can be easily done because reproductive cells can swim through water

Question 3

What is ONE major problem for plants living underwater and why?

Answer 3

Light for Photosynthesis

WATER absorb most of ENERGY as sunlight passes through it

Question 4

When Seawater absorbs LARGE AMOUNTS of energy it corresponds as ______ and _______ wavelengths of sunlight

Answer 4

red and violet

chlorophyll uses best

Question 5

Because of adapting to challenges of having little light, different types of algae evolves different forms of?

Answer 5

chlorophyll

Question 6

Each form of chlorophyll absorbs different _____ of _____

Answer 6

(a,b,c,d)

Absorbs different wavelengths of light

Question 7

Other than chlorophyll, what compounds do algae also evolves?

Answer 7

Evolves compounds called ACCESSORY PIGMENTS that absorb different wavelengths of light than chlorophyll absorbs

Question 8

What do pigments do for the algae?

Answer 8

passes on ENERGY they absorb on to the algae’s photosynthetic machinery

Question 9

How do pigments effect algae?

Answer 9

They give algae a wide range of COLOURS

because accessory pigments reflect different wavelengths of light than chlorophyll