Biology Questions and Answers

Biology Questions and Answers

Grasslands may be classified into

steppes and savannahs. Ithe prevailing vegetation is gn the steppesrass, as in (^)
the pampas of South America and in the
prairies ofmainly formed by herbivores, like North America. The fauna is
rodents and ungulates. The savannahs
present smallBrazilian cerra trees, for example do or the African in the
savannahs. The fauna is diverse; in the
Brazilian cerraostriches, lizardo there are animalsds, armadillos, jaguars, like
etc., and many types of insects; the
African herbivores asavannahs arnd carnivores, like e the home of largezebras,
giraffes, antelopes, lions and leopards.

14. What are the typical
    vegetation and the typical
    fauna of the deserts?

The predominant fauna of desert
ecosystemslizards and snakes, terr is formed by reptiles, likeestrial
arthropods and small rodents. In these

areas plants very climate may be found, like the cactus,adapted to a dry (^)
which are plants that do not have real
leaves anwith grasses and bushes near placesd thus lose less water, along
where water is available.

15. Which terrestrial
    vertebrate group is extremely
    rare in deserts?

Amphibians are terrestrial vertebrates
extremely ra(although there are a few speciesre in desert environments
adapted to this type of ecosystem).
Amphibians arthey do not have a permeable skin ane rare in deserts becaused

so they easily lose water by evaporation

and desiccate.aquatic environment to reproduce, since They also need an (^)
their fecundation is external and their
larva is water-dependent.

16. What are plankton, nekton
    and benthos?
    Plankton, three groups into which nekton and benthos are theaquatic living
    beings may be divided.
    The planktosmall animalsn is formed by the algae and that float near the water

surface carrienekton is composed by the stream. Thd of animals thate (^)
actively swim and dive in water, like
fishes, turtles, wbenthos comprises thales, sharks,he animals etc. Th e
ecologicallyincluding many linked to thechinoderms, benthonice bottom, (^)
fishes, crustaceans, molluscs, poriferans
and annelids.

17. What are the
    phytoplankton and the
    zooplankton?
    Phytoplankton and zooplankton are
    divisionsphytopla of the plankton. nkton comprises theThe
    autotrophic floating beings: algae and

cyanobacteria.formed by the heterotrophic pla The zooplankton isnktonic (^)
beings: protozoans, small crustaceans,
cnidarians, larvae, etc.
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