BIOLOGY

JAMB 2014 - Question 49

Biology 2014 JAMB Past Questions - Question 49: All living organisms are constantly involved in a struggle for existence. This was proposed by

Choose the most appropriate option for the gap .
All living organisms are constantly involved in a struggle for existence. This was proposed by
A:
B:
C:
D:
Examkits App

Examkit's JAMB CBT App

Practice JAMB offline with our Online, PC and Mobile App

  • ✅ 25+ years of past questions (2000 to 2025)
  • ✅ Video solutions and explanation to questions
  • ✅ E-library
  • ✅ Study by topic
  • ✅ And more.

Correct Answer

B

Explanation

The theory of evolution through natural selection was first proposed by Charles Darwin. This theory states that living organisms reproduce very fast when the environment is favorable. This leads to competition (struggle for existence)and selection of the fittest by nature. After some years, Alfred Wallace proposed the same theory of evolution of species by natural selection which coincided with that of Darwin. Charles Darwin presented both theories (his own and that of Wallace) to the world of science. (Linnaean study) in 1858. Morgan was noted for u s i n g fr u i t f l y ( D r o s o p h i l i amelanoqastert to study genetics because this, fly had three advantages namely (I) It breeds large number of offspring within a short period (10days)so that geneticists could watch several generations of fruit flies within one year. (ii) It has only four pairs of clearly distinguishable cliiumosomes in each cell.(iii) It has small size and lots of them can be enclosed in a small container. Morgan developed chromosome mappings i.e. the exact position of genes on the chromosomes called gene loci. Lamarck proposed a theory on evolution (Lamarckism) which explained how changes in a species of organisms take place overtime. His theory is base on use and disuse of body parts and inheritance of acquired traits.

Frequently Asked Questions

Examkits is a JAMB CBT practice platform that provides over 20 years of past questions, Post UTME questions, and detailed video solutions to help students prepare for their exams.

You can practice JAMB past questions online, on Android, or on a desktop using the Examkits app. Just register on our website and choose your preferred device.

Yes. Our Android and Windows versions support offline usage. Once downloaded and activated, no internet is required to use most of the features.

Yes, Examkits provides detailed video explanations for all JAMB past questions from 2000 to 2024, helping students understand how to solve each problem.

Examkits offers free practice for some subjects. However, full access requires a one-time affordable activation fee for each version of the app.