2條Bio題目...About Classification

1. a) A spacecraft carrying several specimens of organisms from another
planet returned to earth. Scientists tried ti classify them with the usual
classification system.

(i) .How do you tell whether an organism is a plant?

(ii).It was found that the organism has structures similar to a backbone.
Nevertheless,it has no limbs and appears like a snake and an eel.
How can we determine whether it should be classified as a fish ,
an amphibian or a reptilr?

b)
(i) .State two reason why a bat is not classified as a bird.

(ii).State two reason why a whale is classified as a mammal but not a fish.

2. A fossil of an unknown organism has been discovered.It is believed that
the organism is an intermediate form between reptils and birds in the
process of the evolution.

a) State two common features found in birds and reptiles.

b) State onr feature found in birds but not in reptiles.

c) Name three other group of vertebrates and give one example for each
group.

d) What is the common characteristic of vertebrates?

e) Suggest one habitat that the unknown organism lived.