Explanation

 Most ciliates exchange genetic material through a process called conjugation.

This process involves the temporary union of two ciliates, during which they exchange genetic material, specifically from their micronuclei. This exchange is a form of sexual reproduction that leads to genetic recombination and diversification within the population. 

Explanation

The most abundant carbohydrate in nature is cellulose

It is a structural polysaccharide that forms the cell walls of plants and is found in vast quantities throughout the plant kingdom. 

Explanation

When oxygen tension is 115 mm of mercury, hemoglobin saturation is 100%. 

At high oxygen tensions (like 100 mm Hg and above), essentially all available hemoglobin binding sites are occupied by oxygen molecules, resulting in complete saturation. 

Explanation

Cellular respiration is the process by which cells break down glucose to produce ATP (energy).

It occurs in mitochondria.

It provides energy for all cellular activities.

Explanation

The nucleotide found only in RNA is uracil (U).

While RNA and DNA share adenine (A), cytosine (C), and guanine (G), RNA utilizes uracil in place of thymine (T), which is found in DNA. 

Explanation

A photometer measures the intensity of light absorbed or transmitted by pigments at different wavelengths.

It is used to study absorption spectra, especially in photosynthesis research.

Explanation

Explanation

The theory that all living cells are of common origin is attributed to August Weismann. 

Explanation

Circinate vexation refers to the coiled arrangement of young leaves (usually in ferns) where the tip is rolled inward.

As the leaf matures, it gradually unrolls — a unique characteristic of fern leaves (fronds).

Explanation

The condition where the male sexual cells develop earlier than female cells is called protandrous.