The Reproductive System — Biology STD 10 — Question

Tom, a biology student, is studying the theory of natural selection proposed by Charles Darwin. He wonders how natural selection applies to the evolution of antibiotic resistance in bacteria. Which of the following best describes how natural selection contributes to the evolution of antibiotic resistance in bacteria?

Which one of the following pairs is not correctly matched?

A potted plant with variegated leaves was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours and then placed in bright sunlight for a few hours. What aspect of photosynthesis is being tested in the below diagram?

It receives sound vibrations and passes to the ear drum.

Choose the Odd One Out:

Which anatomically modern human species is known to have coexisted with Homo neanderthalensis?

Assertion (A): Australopithecus species are considered to be the earliest ancestors of modern humans.
Reason (R): They were bipedal and had brain sizes similar to that of modern chimpanzees.

Choose the Odd One Out:

Birth rate is the number of live births per thousand persons in:

Duplicated chromosomes are joined at a point termed: