One of the following is not a consumer. This one is :
(a) giraffe
(b) antelope
(c) algae
(d) alligator
(c) algae Algae are producers, which prepare their food themselves through photosynthesis. They are not consumers.
One of the following is not a vector quantity. This one is :
(a) displacement (b) speed (c) acceleration (d) velocity
One of the following is not a combustible susbtance. This one is :
(a) alcohol
(b) hydrogen
(c) asbestos
(d) chaff