How do RED ALGAE differ from BROWN ALGAE?

Question

a.they are all many celled

b.most live in saltwater habitats

c.they have pigments that can harness energy of dim light

d.they have specialized structures such as hold fasts and stalks

e. none of the above

PLEASE HELP ME!

Answer 1

Is this from school?  It is worded kinda tricky.

A and B are true of both red and brown algae.

C is true but they have different pigments and characteristics.     Red had phycoerythrin pigments and Brown has fucoxanthin. They both harvest light more efficiently at deeper depths than green algae which lives in shallow water. Red can live deeper than Brown.  This may be what the "difference" is referring to.

D is interesting because they have different specialized structures but they both have holdfasts with which to attach to their substrate.  For instance, red algae secretes CaCo3 and are important builders of limestone reefs.  They have pit connections and pit plugs between membrane walls.

Brown algae have chloroplasts surrounded by four membranes and are unique among heterokonts by developing into multicellular forms with differentiated tissues, but they reproduce by means of flagellate spores, which closely resemble other heterokonts.

It seems that you have to guess whether the answer is E or C.

Either one could be right but I would say E due to the way C is worded.

Answer 2

I would say c, because red algae are able to live in greater depths than brown algae for they are able to absorb limited amounts of light.

Good luck with the question. It seems very wordy. :]

Answer 3

umm i would think it is c ... yea

good luck figuring out the other questons u asked...