Telomere repetitive DNA sequences control the function of eukaryotic chromosomes because they:

1. act as replicons

2. are RNA transcription initiators

3. help chromosome pairing

4. prevent chromosome loss

Identify the odd combination of the habitat and the particular animal concerned.

In the leaves of C₄ plants, malic acid formation during CO₂ fixation occurs in the cells of:
1. mesophyll
2. bundle sheath
3. phloem
4. epidermis

A human male produces sperms with the genotypes AB, Ab, aB and ab pertaining to two diallelic characters in equal proportions. What is the corresponding genotype of this person?

1. AaBb

2. AaBB

3. AABb

4. AABB

Which of the following ecosystem types has the highest annual net primary productivity?

1. Tropical rainforest

2. Tropical deciduous forest

3. Temperate evergreen forest

4. Temperate deciduous forest

In human body, which one of the following is anatomically correct?

Which of the following is a flowering plant with nodules containing filamentous nitrogen-fixing microorganism?

1. Casuarina equisetifolia

2. Crotolaria juncea

3. Cycas revoluta

4. Cicer arietinum

The population of an insect species shows an explosive increase in numbers during the rainy season followed by its disappearance at the end of the season. What does this show?

One of the endangered species of Indian medicine plants is:

1. Podophyllum

2. Ocimum

3. Garlic

4. Nepenthes

In hexaploid wheat, the haploid (n) ar basic (x) numbers of chromosomes are:

1. n=7 and x=21

2. n=21 and x=21

3. n=21 and x=14

4. n=21 and x=7