Biology Questions and Answers
- How are the three main
arthropod classes
characterized according to the
presence of antennae?
Crustaceansantennae; insects have one pair; have two pairs of (^)
arachnids do not have antennae.
- How are the three main
arthropod classes
characterized according to the
body division?
In crustaceansis fused with th and arachnids te thorax forming thehe head
cephalothdivided into cephalothorax aorax. Their body thus isnd
abdomen.
In insects there are head, thorax and
abdomen.
- How are the three main
arthropod classes
characterized according to the
number of limbs?
Most crustaceans have five pairs of
limbs. Iarachnids prnsects have three pairs anesent four pairs of limbs.d
- Which arthropod class is
the most diversified animal
group of the planet? How can
this evolutionary success be
explained?
The insectsmost diversity of species. Almost are the animal group with
750000 insect species are known, about
55% ospecies of f the total already catalogeliving beings (compare withd (^)
mammals, with no more than 4000
known species). Ithat the number of unknown species ot is calculated howeverf
insects may be over 2 million. The
insect population oestimated to be more than 10 n the planet isquintillion (^)
(1000000000000000000) individuals.
The great evolutionary success of
insects is due to factorssize and alimentary diversity, such as: small making
possible the exploration of numerous
different ecological niches; winprovided more geographic spread; thegs that (^)
tracheal respiration that gave them
motor with production oagility; high reproductive ratesf great numbers of
descendants.
- What are some examples
of beings of the phylum
Arthropoda that present a
high level of behavioral
sophistication?
Insects like somwasps, ants and termitese species of bees, form societies (^)
that include hierarchy and job division
among members. Ssophisticated external structures, wepiders build (^) bs,
mainly to serve as a trap for capturing
prey. Another example is the
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