A thousand ways to pass basic biology examination

181.Two plants with red flowers were back crossed, which of the following results indicates that the plants are heterozygous red flower, where red flowers are dominants?
  • A. 75% red and 25% white
  • B. 50% red and 50% white
  • C. 100% white
  • D. 100% red
182.Genetically modified food products have not become universally accepted because
  • A. They are not tasty as others produced by conventional means
  • B. They are usually costlier than others produced by conventional means
  • C. Their effects on human consumers is not yet fully understood
  • D. The technology can be applied only in developed countries
183.Which of these animals is not metamerically segmented
  • A. Tapeworm
  • B. Earthworm
  • C. Centipede
  • D. Shark
184.The sterile individuals in the honey bee are known as
  • A. Drone
  • B. Queens
  • C. Workers
  • D. None of these
185.Which of the following is used mainly for balancing in fish?
  • A. The caudal fin
  • B. The pectoral fin
  • C. The anal fin
  • D. The dorsal fin
186.Octopus is popularly known as____fish
  • A. Devil
  • B. Jelly
  • C. Cray
  • D. Shark
187.The sexual reproductive units produced by mature individuals or sexually reproducing species of organism is called
  • A. Sperms
  • B. Ova
  • C. Zygotes
  • D. Gametes
188.Which of these does not have respiratory and circulatory systems
  • A. Annelids
  • B. Nematodes
  • C. Insects
  • D. Molluscs
189.Spear grass has underground structure called
  • A. Bulbs
  • B. Corms
  • C. Rhizomes
  • D. Tap roots
190.Maize is best stored against insect attack
  • A. On raised platform
  • B. In fumigated silos
  • C. While still on the cob
  • D. In humid metal tanks
191.Circulation of blood to all parts of the body except the lungs is through
  • A. The pulmonary artery
  • B. Systematic circulation
  • C. The lymphatic system
  • D. Pulmonary circulation
192.Manufactured food in plants is transported through the
  • A. Xylem
  • B. Phloem
  • C. Cambium
  • D. Cortex
193.The genetic make-up of an organism is called
  • A. Genotype
  • B. Phenotype
  • C. Variation
  • D. Gene
194.A sudden change in a gene or genes is called
  • A. Fertilization
  • B. Variation
  • C. Mutation
  • D. Heredity
195.Which of the following statements is true of blood groups and blood transfusion?
  • A. Group A can donate to group A only
  • B. Group B can donate to group B only
  • C. Group O is the universal recipient
  • D. Group AB is the universal recipient.
196.A tall plant crossed with a dwarf one produces off spring of which half are tall and half are dwarf. What are the genotypes of the parents?
  • A. Tt, tt
  • B. TT, tt
  • C. Tt, Tt
  • D. TT,TT
197.Both recessive and dominant characters are found
  • A. at the same locus of a homologous chromosome
  • B. at different loci of homologous chromosome
  • C. on different chromosomes in the cell
  • D. on the same chromatid in a chromosome.
198.Which of the following is likely to encourage inbreeding in plants
  • A. monoecious
  • B. dioecious
  • C. hermaphrodite
  • D. protandrous.
199.The probability of a baby being a boy or a girl depends on the contribution of the
  • A. mother’s sex cell
  • B. mother’s X chromosome
  • C. father’s sex cell
  • D. father’s somatic chromosome.
200.The ability of an organism to live successfully in an environment is known as
  • A. succession
  • B. resistance
  • C. adaptation
  • D. competition.