Air pollution

True.

Explanation:

The hypothalamus plays a crucial role in maintaining body balance in humans by regulating various physiological processes such as body temperature, hunger and thirst, sleep-wake cycles, hormone release, and overall homeostasis.

False.

Explanation:

In DNA, adenine (A) is always paired with thymine (T) by two hydrogen bonds, and guanine (G) is always paired with cytosine (C) by three hydrogen bonds.

False.

Explanation:

In his monohybrid cross experiments, Mendel obtained a 100% pure tall phenotype in the first filial generation (F1) because he crossed pure tall (dominant) plants with pure short (recessive) plants. The F1 generation showed the dominant trait exclusively.

False.

Explanation:

According to Lamarck's theory of evolution, organisms can acquire certain traits during their lifetime through use and disuse, and these acquired traits can be passed on to their offspring.

True.

Explanation:

Acid rain is primarily caused by the emission of sulfur dioxide (SO₂) and nitrogen dioxide (NO₂) gases into the atmosphere due to human activities, particularly the burning of fossil fuels.

False

Explanation:

Cytokinin and gibberellin are growth promoters that help in breaking seed dormancy when the conditions are appropriate and hence promote germination.

2.13 - (f).

2.14 - (c).

2.15 - (e),

2.16 - (a),

2.17 - (b),

2.18 - (g)

The odd one is Goiter.

Reason:

• Dwarfism, Thalassemia, and Diabetes Mellitus are genetic or metabolic disorders.
• Goiter is a condition related to the thyroid gland, often caused by iodine deficiency, not directly related to genetics or metabolism like the others.

The Lens of the eyeball helps to focus the light onto the retina.

Meiosis

Yes, the phenotype of the two genotypes bbRR and bbRr in guinea pigs would be the same.