Biology Past Questions And Answers
Genes that remain linked are those
- A. close to each other on the chromosomes
- B. on the same locus on the chromosomes
- C. on the homologous chromosomes
- D. which are allelic pair
The sum total of all the roles an organism plays in a habitat is referred to as
- A) ecology
- B) ecosystem
- C) habit
- D) Niche
Which gland is responsible for producing the hormone insulin?
- A. Thyroid gland
- B. Pituitary gland
- C. Pancreas
- D. Adrenal gland
A-person who fails to detect the bitter taste of a substance swallowed, is more likely to have
View Discussion (0)WAEC 2001 THEORYIf a person has two alleles of the sickle cell anaemia gene, the person
- A. is a heterozygous carrier of the disease
- B. is immune to the disease and cannot pass it on to an offspring
- C. has the disease
- D. is probably of Asian ancestry
A farmer has 1000 chickens. A disease is introduced into the population that infects almost all of the chickens. The farmer loses 500 chickens to this disease. The chickens that were infected but didn't die produce fewer eggs than the chickens that were never sick, so generations later, there are more chickens that are immune to the disease than chickens who can be infected with the disease. A few generations of chickens later, the genetic diversity of the chickens is drastically reduced. What evolutionary processes are at play?
- A. Natural selection and population bottleneck.
- B. Natural selection and mutation.
- C. Natural selection and genetic drift.
- D. Mutation and genetic drift
In which of the following parts of a cell is the chromosome fund?
- A. Nucleus
- B. Golgi body
- C. Cytoplasm
- D. Cell membrane
Which of the following factors would be least likely to act as a density dependent limiting factor in a population of mice?
- A. Buildup of waste products
- B. Predation
- C. Parasitism
- D. Unfavourable climate
Epiphytes growing on the branches of trees provide an example of the relationship known as?
- A. parasitism
- B. commensalism
- C. saprophytism
- D. holophytism
Which of the following is true of climax community?
- A. it persists until the enviroment or climate changes
- B. it changes drastically from one year to the next
- C. it is first stage in succession
- D. It is made up of the tallest trees and the smallest