Biology Past Questions And Answers
1051
The supporting tissue in xylem is most poorly developed in
- A. mangrove swamp plants
- B. grassland plants
- C. submerged water plants
- D. desert plants
1052
A pollutant that is mostly associated with acid rain is
- A. Nitrogen (IV) Oxide
- B. Ozone
- C. Fluorine
- D. Carbon (IV) Oxide
1053
The activity of ptyalin is likely to decrease with an increase in concentration of
- A. oxygen
- B. starch
- C. protein
- D. acid
1054
Which of the following options best describes adaptation for survival in organisms?
- A. Adaptation is the inherited trait that increases an organism's chances of survival and reproduction in its environment
- B. Adaptation is the process by which organisms acquire new characteristics during their lifetime
- C. Adaptation refers to the ability of an organism to change its environment to better suit its needs
- D. Adaptation involves the development of new traits in response to changes in the environment
1055
Respiration is an essential life process providing the living cells with
- A. oxygen
- B. sugars
- C. energy
- D. carbon dioxide
1056
A flower made up of one carpel is referred to as
- A) apocarpous
- B) monocarpous
- C) monogamous
- D) pericarpous
1057
Variation which exhibits a wide range from one extreme to the other is
- A. phenotypic variation
- B. discontinuous variation
- C. continuous variation
- D. genotypic variation
1058
The cell walls of bacteria, plants, and fungi are of varying composition. Fungi cells are composed of __________.
- A. peptidoglycan
- B. cellulose
- C. glycogen
- D. chitin
1059
The organic molecule (s) present in the nucleus is/are
- A. DNA
- B. Protein, RNA and DNA
- C. RNA and ATP
- D. RNA
1060
A peculiar characteristics of mammals is that they
- A. have teeth
- B. are warm-blooded
- C. have lungs
- D. have sabaceous glands