Biology Past Questions And Answers
Which of the following mineral salts is a trace element?
- A. Zinc
- B. Carbon
- C. Hydrogen
- D. Potassium
A given trait has two alleles. It is inherited in a completely autosomal dominance pattern in a diploid population. Which of the following is NOT true if this population is in Hardy-Weinberg equilibrium?
- A. Allele frequencies vary significantly from generation to generation.
- B. The frequency of the heterozygous genotype is equal to two times the frequency of the dominant allele times the frequency of the recessive allele.
- C. The frequency of the dominant allele plus the frequency of the recessive allele must add up to 1.
- D. The frequency of the dominant phenotype is equal to the frequency of the dominant allele squared.
In bryophytes, sex organs are produced in the
- A. protonema
- B. sporophyte
- C. gametophyte
- D. rhizoid
Which of the following forms about 55% of the volume of the blood in man?
- A. leucocytes
- B. platelets
- C. plasma
- D. erythrocytes
The structure that joins the two strands of a chromosome together is the?
- A. spendle
- B. chromomere
- C. centromere
- D. chomated
The region of a plant stem in which cells divide to increase its diameter is
- A. cambium
- B. phloem
- C. xylem
- D. collenchyma
The jointed structure in insects that bears organs which are sensitive to touch, smell and vibration is the
- A. maxilla
- B. labium
- C. antenna
- D. abdomen
Which of the following food substances is digested in the stomach?
- A) carbohydrates
- B) fats and oil
- C) fats and protein
- D) proteins
Which of the following cells is a specialized cell?
- A. Amoeba
- B. Plasmodium
- C. Guard cell
- D. Meristematic cell
The growth of mucor on a piece of bread is?
- A. scavenging
- B. commensalism
- C. autotrophism
- D. saprophytism