In the 5—7 million years that the hominid lineage has been diverging from its common ancestor with the great apes, dozens of hominid species have arisen, often with several species coexisting in time and space. As recently as 30,000 years ago, Homo sapiens coexisted with Homo neanderthalensis. Both species had large brains and advanced intellects. The fact that these traits were common to both species is most easily explained by which of the following?

#Question id: 11660

#Unit 10. Ecological Principles

Which of the following statements about the succession is true?

#Question id: 8939

#Unit 9. Diversity of Life Forms

#Question id: 3633

#Unit 8. Inheritance Biology

In a maternity ward, four babies become accidentally mixed up. The ABO types of the three babies are known to be A, B, and AB. The ABO types of the four sets of parents that are clamed are determined.

(A) AB X O  (B) A X O, (C) A X AB, (D) B  X O.

Following some statement is given

A. A blood group baby must be child of Parent B

B. B blood group baby must be child of Parent A

C. AB blood group baby must be child of Parent A

D. AB blood group baby must be child of Parent C

Which of the following above statement is correct?

#Question id: 12253

#Unit 10. Ecological Principles

#Question id: 785

#Unit 1. Molecules and their Interaction Relevant to Biology

Several types of very short RNAs repress—or silence—expression of genes with homology to those short RNAs. They are produced from a variety of sources and direct the silencing of genes in the following different ways-