Biology Past Questions And Answers
The butterfly is of great economic importance because
- A. of it's use in scientific studies
- B. it sucks nectar from flowers
- C. it adds to the beauty of the environment
- D. it pollinates flowers of crops and other plants
I. High birth rate and high immigration rate
II. Low birth rate and high immigration rate
III. Low mortality rate and low emigration rate
IV. High mortality rate and high emigration rate.
Which combination of the above can cause rapid over-crowding in climax biotic communities and human settlements?
- A. II and III
- B. I and III
- C. I and IV
- D. I and II
A group of organisms of the same species living in a particular place is known as
- A. colony
- B. ecosystem
- C. Niche
- D. population
Cellular respiration involves a series of chemical reactions. Which of the following is a primary way that enzymes affect these reactions?
- A. They change the location of the reactions in the cell
- B. They decrease the pH of the products
- C. They increase the rate of reactions
- D. They take the place of oxygen as a reactant
Which of the following is an autotrophic mode of nutrition?
- A. Chemosynthesis
- B. Saprophytism
- C. Parasitism
- D. Symbiosis
Water is mostly absorbed during digestion in the _______.
- A) large intestine
- B) liver
- C) pancreas
- D) small intestine
Which of the following practices may lead to infection of the eye? Use of
- A. contact lenses
- B. convex lenses
- C. biconcave lenses
- D. concave lenses
Study the diagram below and answer the question
The structure labelled I is
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- A. a pitcher
- B. an onion
- C. a flower
- D. a tendril
Bacteria differ from eukaryotic forms of life in that they:
- A) are causes of all infectious diseases
- B) have no nuclear membrane
- C) reproduce by binary fission
- D) have a thick cell-wall
A fresh water plant such as water lily can solve the problem of buoyancy by the possession of
- A. aerenchymarous tissues
- B. dissected leaves
- C. thin cell walls of the epidermis
- D. water-repelling epidermis