In a country. at any time, the population has the same number of youngs and mature ones. What type growth does it reflect ?

Variation is an important contributor in the process of evolution. Which of the following factors does not contribute new variation in a population?

Which of the following scientist(s) is/are credited for disproving the theory of spontaneous generation?
(1) Matthias Schleiden and Theodor Schwann
(2) Francesco Redi
(3) Aristotle
Codes:

It is an accepted fact that Hardy–Weinberg principle explains that a genetic equilibrium is maintained in a population over time under certain conditions. Which of the following condition does not facilitate maintenance of equilibrium?

Which of the following is not an example of analogous organ?