Primary succession can occur in essentially lifeless areas or regions in which the soil is incapable of sustaining life as a result of such factors as lava, sand dunes, or rocks left from a retreating glacier.
Answer:
The individual is a male. Explanation: In mammals, sex is determined by a pair of sexual chromosomes.
Answer:
Pathway of air: nasal cavities (or oral cavity) > pharynx > trachea > primary bronchi (right & left) > secondary bronchi > tertiary bronchi > bronchioles > alveoli (site of gas exchange)
Explanation:
Answer:
A split hooved mammal that chews the cud regurgitated from its rumen.
Explanation:
Answer:
The correct answer is c. redundant organs present in an organism, which have been functional in the organism’s ancestors.
Vestigial organ are those which are retained in the evolution however lost their original functions due to change living habits or surroundings of the organisms.
They serve as the evidence of evolution and help in evolutionary studies.
For example, vermiform appendix, nictating membrane of eye, ear muscle etc are vestigial organs found in humans.
