Biology 2020 Jamb Examination
Biology 2020 Jamb Examination
Question 1
The hormone which regulates the amount of glucose in the blood is called?
Insulin is a hormone secreted by the pancreas that regulates blood glucose levels. It promotes the uptake of glucose into cells for energy production and storage, preventing hyperglycemia.
Not clear enough?
Question 2
Deamination occurs in the?
Deamination is the process of removing an amino group from amino acids, which primarily occurs in the liver. This process converts amino acids into keto acids for energy or urea formation.
Not clear enough?
Question 3
In an agricultural ecosystem, the biotic component consist of
The biotic components of an agricultural ecosystem include all living organisms such as crops, pests, and beneficial insects. These interact and influence the ecosystem's structure and productivity.
Not clear enough?
Question 4
Epiphytes growing on the branches of trees provide an example of the relationship known as?
Commensalism is a relationship where one organism benefits while the other is neither helped nor harmed. Epiphytes, for example, grow on trees to gain support but do not harm the host.
Not clear enough?
Question 5
The hypha of rhizopus is said to be non-septate because it
Rhizopus hyphae are non-septate (coenocytic) because they lack cross walls (septa) between cells. This allows free cytoplasmic flow and distribution of nutrients along the hypha.
Not clear enough?
Question 6
The function of ribosome in cells is
Ribosomes are cell organelles responsible for protein synthesis. They translate mRNA into polypeptides, providing essential proteins for cell growth, repair, and enzymatic functions.
Not clear enough?
Question 7
In which of the following does external fertilization take place?
External fertilization occurs when eggs and sperm are released into the environment, typically water. In toads, males release sperm over eggs in water to allow fertilization externally.
Not clear enough?
Question 8
The villus in the small intestine is significant because
Villi are small finger-like projections in the small intestine that increase the surface area, facilitating efficient absorption of nutrients from digested food into the bloodstream.
Not clear enough?
Question 9
The butterfly is of great economic importance because
Butterflies contribute economically by pollinating crops and other flowering plants. This ecological service helps in fruit and seed production, supporting agriculture and maintaining biodiversity.
Not clear enough?
Question 10
The bright colours of the comb and feathers in the peacock are for?
The bright colors of the peacock's comb and feathers function primarily in courtship, attracting females during mating displays. These colors signal health and genetic fitness to potential mates.