Consider the following statements about the blood: 1. Plasma is about 55% of blood volume. 2. Albumin is the most abundant plasma protein. 3. Red blood cells have nuclei in humans. Which of the above is/are correct? MCQ with Answer and Explanation

Explanation:
Guttation is the exudation of water droplets from hydathodes, driven by root pressure under high humidity and low transpiration conditions.

Explanation:
The chemical evolution theory, also known as the biochemical theory of the origin of life, was proposed independently by Alexander Oparin (1924) and J.B.S. Haldane (1929). They proposed that life originated from pre-existing non-living organic molecules (like RNA, proteins, lipids) through a series of complex chemical reactions in the primitive reducing atmosphere of Earth.

Explanation:
DNA (deoxyribonucleic acid) is the universal genetic material in all cellular organisms (prokaryotes and eukaryotes) and many viruses, storing hereditary information. Some viruses, known as RNA viruses (like HIV, influenza, and TMV), use RNA (ribonucleic acid) as their genetic material instead of DNA. Proteins are the products of gene expression and perform various cellular functions, but they are never the genetic material in any cell or virus. Thus, statements 1 and 2 are correct.