Which of the following statements are true with reference to homology or homologous organs?
(A) Homology indicates common ancestry.
(B) Whale and Cheetah share similarities in the pattern of the bones of the forelimbs.
(C) Vertebrate heart is an example of homologous organs.
(D) Thorn of Bougainvillea and tendrils of cucurbita represent homology.
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In some organisms, male has ZZ chromosomes and female has ZW chromosomes. This type of sex-determination is found in:

The traits which are controlled by more than one gene are known as:

Sickle cell anaemia is :

Read the passage carefully and answer the questions based on the passage:
Species diversity on earth is not uniformly distributed. It is generally highest in the tropics and decreases towards the poles. Earth's fossil history reveals the incidences of mass extinctions in the past. Earth's rich biodiversity is vital for the very survival of mankind. It is believed that communities with high diversity tend to be less variable and more productive. The reasons of conserving biodiversity are narrowly utilitarian, broadly utilitarian and ethical. Biodiversity conservation may be in-situ as well as ex-situ.
Which of the following might not account for the greater biological diversity in the tropic region?

Identify the statements which are not true for the genetic code.
(A) 64 codons code for amino acids.
(B) The genetic code is nearly universal with some exceptions found in mitochondrial codons and some protozoans.
(C) Some amino acids are coded by more than one codon.
(D) AUC codes for methionine
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Which of the organism is responsible for the malignant malaria?

The refractive index of the material of an equilateral prism is \(\sqrt{2}\). The angle of minimum deviation of that prism is :

What is the IUPAC name of resorcinol?

The direction cosines of the normal to the plane \(x-y+z=4\) are :

Hoffmann bromamide degradation method is used for preparation of

Arrange the following complexes in increasing order of number of moles of silver chloride precipitated
when one mole of each is reacted with excess of silver nitrate.
(A) \(\left[ Co \left( NH _3\right)_4 Cl _2\right] Cl\)
(B) \(\left[ Co \left( NH _3\right)_5 Cl \right] Cl _2\)
(C) \(\left[ Co \left( NH _3\right)_3 Cl _3\right]\)
(D) \(\left[ Co \left( NH _3\right)_6\right] Cl _3\)
Choose the correct answer from the options given below:

Which one of the following genotypes represents a similar skin color?