Which one of the following living organisms completely lacks a cell wall?
Cyanobacteria
Sea-fan (Gorgonia)
Saccharomyces
Saccharomyces
B.
Sea-fan (Gorgonia)
Sea-fan (Gorgonia) belongs to Kingdom-Animalia Phylom, Cnidaria and order: Gorgonacea. As it is on the animal, thus it lacks cell wall cyanobacteria of B we green algae (kingdom Monera) have a cell wall which is composed of peptidoglycan.
Saccharomyces is a genus of kingdom fungi which includes many species of yeast. Their cell wall is mode up of chitin
Viruses have
DNA enclosed in a protein coat
prokaryotic nucleus
single chromosome
single chromosome
An aggregate fruit is one which develops from
multi carpellary syncarpous gynoecium
Multi carpellary apocarpus gynoecium
complete inflorescence
complete inflorescence
Anoxygenic photosynthesis is characteristic of
rhodospirlllum
Spirogyra
Chlamydomonas
Chlamydomonas
Select the taxon mentioned that represents both marine and freshwater species
Echinoderms
Ctenophora
Cephalochordata
Cephalochordata
Which one of the following growth regulators is known as stress hormone?
abscsic acid
Ethylene
GA3
GA3
An alga which can be employed as food for human being is
Ulothrix
Chlorella
Spirogyra
Spirogyra
A few normal seedlings of tomato were kept in a dark room. After a few days they were found to have become white - coloured like albinos. Which of the following terms will you use to describe them?
Mutated
Embolised
Etiolated
Etiolated
