many secondary metabolites have been suggested to have important ecological functions in plants:

a) they protect plants against being eaten by herbivores (herbivory)

b) they protect plants against being infected by microbial pathogens

c) they serve as attractants for pollinators and seed dispersing animals

d) they serve as agents of plant–plant competition

Which of the following combination from above statements is correct?

#Question id: 4965

#SCPH28 | Zoology

What is thought to be the correct sequence of these events, from earliest to most recent, in the evolution of life on Earth?

1.  origin of mitochondria

2.  origin of multicellular eukaryotes

3.  origin of chloroplasts

4.  origin of cyanobacteria

5.  origin of fungal-plant symbioses

#Question id: 4966

#SCPH06 I Botany

If it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.2-billion-year-old stromatolites, then within such microfossils, one should be surprised to observe evidence of:

I. double-stranded DNA

II. a nuclear envelope

III. a nucleoid

IV. a nucleolus

V. nucleic acids

#Question id: 4966

#SCPH28 | Zoology

If it were possible to conduct sophisticated microscopic and chemical analyses of microfossils found in 3.2-billion-year-old stromatolites, then within such microfossils, one should be surprised to observe evidence of:

I. double-stranded DNA

II. a nuclear envelope

III. a nucleoid

IV. a nucleolus

V. nucleic acids

#Question id: 4967

#SCPH06 I Botany

Recent evidence indicates that the first major diversification of multicellular eukaryotes may have coincided in time with the

#Question id: 4967

#SCPH28 | Zoology

Recent evidence indicates that the first major diversification of multicellular eukaryotes may have coincided in time with the

#Question id: 4968

#SCPH06 I Botany

Which of these observations fails to support the endosymbiotic theory for the origin of eukaryotic cells?