Charles Darwin and Alfred Wallace independently proposed natural selection as the mechanism for evolution. Darwin published 'On the Origin of Species' in 1859.
Explanation:
Acidosis is a condition of decreased blood pH (7.45). Homeostasis is maintenance of stable internal environment. Apoptosis is programmed cell death. Acidosis can be respiratory (due to CO₂ retention) or metabolic (due to accumulation of acids like lactic acid or ketone bodies).
Explanation:
Transpiration is the evaporative loss of water from the aerial parts of plants, primarily through stomata. It creates transpiration pull, aiding water and mineral transport. Guttation is loss of liquid water droplets from hydathodes. Evaporation is a physical process from any surface. Condensation is change from vapour to liquid. Transpiration also cools the plant.
Consider statements about genetics: 1. A gene is a segment of DNA that codes for a protein. 2. Alleles are alternative forms of a gene. 3. The phenotype is the genetic makeup of an organism. Which are correct?
Explanation:
A gene is a specific sequence of nucleotides in DNA that serves as the fundamental unit of heredity, typically coding for a specific protein or RNA molecule. Alleles are different versions or alternative forms of the same gene that occupy the same locus on homologous chromosomes and determine variations in a trait. The genotype is the genetic makeup of an organism, while the phenotype is the observable physical or biochemical characteristics. Thus, statements 1 and 2 are correct.
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