Which of the following features is not present in Periplaneta americana?
Indeterminate and radical cleavage during embryonic development
Exoskeleton composed of N-acetylglucosamine
Metamerically segmented body
Metamerically segmented body
A.
Indeterminate and radical cleavage during embryonic development
Cockroach has determinate cleavage during emembryonic development and it develops into nymph, which is a fully developed cockroach.
Which of the following characteristic features always holds true for the corresponding group of animals?
Viviparous | Mamalia |
Posess a mouth with an upper and lower jaw | Chordata |
3-chmbered heart with one incompletely divided ventricle | Reptilia |
Cartiliginous- endoskeleton | Chondrichthyes |
C.
3-chmbered heart with one incompletely divided ventricle | Reptilia |
Except for crocodilians, which have a four-chambered heart, all reptiles have a three-chambered heart consisting of two atria and one ventricle. The chamber called the right atrium receives deoxygenated, or 'spent' blood returning from the body tissues.
The eyes of Octopus and eyes of cat show different patterns of structure, yet they perform a similar function. This is an example of
homologous organs that have evolved due to convergent evolution
homologous organs that have evolved due to divergent evolution
analogous organs that have evolved due to convergent evolution
analogous organs that have evolved due to convergent evolution
C.
analogous organs that have evolved due to convergent evolution
The analogous organs are not anatomically similar structures through they perform similar structure though they perform similar functions, Hence, analogous structures are a result of convergent evolution different structures evolving for the same function and hence, having similarity.
Homologous organs developed along different due to adaptations to different needs. This is divergent evolution and the structures are homologous.
Which of the following features is not present in the phylum-Arthropoda?
Metameric segmentation
Parapodia
Jointed appendages
Jointed appendages
B.
Parapodia
Parapodia are present in annelids.