161.

What are coacervates?

Give four anatomical differences between a dicot and monocot root.

Write the characteristics of Ramapithecus, Dryopithecus and Neanderthal man.

Write the names of the following :
(a) A 15 mya primate that was ape-like
(b) A 2 mya primate that lives in East African grasslands

With the help of an algebraic equation, how did Hardy-Weinberg explain that in a given population the frequency of occurrence of alleles of a gene is supposed to remain the same through generations?

Differentiate between analogous and homologous structures.

Select and write analogous structures from the list given below:

(i) Wings of butterfly and birds

(ii) Vertebrate hearts

(ii) Tendrils of bougainvillaea and Cucurbita

(iv) Tubers of sweet potato and potato

Convergent Evolution' is shown by

• homologous organs

• analogous organs

• vestigial organs

• all of the above

Which of the following statements is correct

• Lion and leopard show convergent evolution.

• Cryptic camouflage is seen in Biston betularia

• Natural selection is responsible for extinction of dinosaurs.

• Homo habilis and Homo erectus are closely related.

Analogous structures are a result of

• convergent evolution

• shared ancestry

• stabilising selection

• stabilising selection