Question

WATER HAS MANY UNIQUE PROPERTIES THAT MAKE IT ESSENTIAL TO LIFE ON EARTH. THESE PROPERTIES ARE DUE TO THE FACT THAT:

A. Water is polar molecule

B. Water is hydrophobic

C. Water molecules are attracted to each other

D. through hydrogen bonds

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WHICH STATEMENT IS TRUE REGARDING MELOSIS?

A. all daughter cells produced are genetically identical

B. Its results in a new combination of genetic traits

C. Used for repair and growth of an organism

D. It occurs in sexually reproducing animals

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A HOMOZYGOUS INDIVIUAL?

A. has two different alleles of a particular gene

B. Has two identical alleles of a particular gene

C. Can arise only from the mating of two

D. heterozygotes

E. None of the above

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WHICH OF THE BELOW BIOMES IS NOT LIKELY TO BE FOUND WITHIN THE UNITED STATES :

A. Tropical rain forest

B. Desert

C. Temperate forest

D. grassland

Answer 1

1. All of these mentioned properties of water make it essential to life on earth. If one of them is to be chosen it is the property of water, "it is a polar molecule". This is because polar nature of water makes it a versatile solvent and a useful tool that can be used to transport a wide range of molecules.

So, the correct answer is, option A.

2. In meiosis, an important cell during each cycle is crossing over and recombination. This step takes place in Meiosis 1 and is important for the formation of new combination of characters and traits in organisms. The other options are not true because,

• due to recombination, the daughter cells produces are not genetically identical to each other,
• for repair and growth of an organism mitosis is used, and
• even in hermaphrodite organisms, there are male and female sex organs where gametes form by meiosis.

So the correct option for the question is B. Its results in a new combination of genetic traits.

3. The presence of two same alleles of a gene at a locus, be it dominant allele or recessive allele, makes them homozygous individuals. So, the correct option here is B. Has two identical alleles of a particular gene.

4. The one Biome that is unlikely to be found in USA is the Tropical rain forest. This is because, USA is situated in the temperate zone and it is most likely not to be the home of tropical biomes. So, the correct answer for the question is A. Tropical rain forest.

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