Correct Answer: B. TQR, tqr

Correct Answer: B. Industrial wastes

Correct Answer: B. Prostate gland

Correct Answer: C. Pith,xylem, cambium,phloem,collenchyma, parenchyma and epidermis

Correct Answer: D. two

Explanation

(a)(i) Ecosystem: -

• This is a self-supporting unit/ system.
• it consists of all living organisms and the non-living factors, that interact with each other/are interdependent.
• Each component influences the properties of the others.
• The living organisms make up the biotic components, e.g. plants and animals
• The non-living factors make up the abiotic components; e.g. soil/edaphic factors/climatic factors.

(ii)Population: This refers to the total number of organisms/individuals of the same kinds/ species living together within a habitat/area at a particular time. The size of the population varies due to different factors; e.g. natality/mortality/immigration/emigration.

(iii) Ecological succession in plants: -This is the orderly series of changes occurring in plant communities over a given period of time, until a stable/climax community is established. It usually commences in a newly formed open/barren habitat/abandoned farmland, which is usually as a result of human activities/natural disasters/ catastrophes. The pioneer/primary colonizers have short life cycles/span, which get replaced by other plants which thus derive nutrients from their remains. These latter secondary colonizers have longer life cycles/span. - The initial pace of a succession is rapid but it gradually slows down until a final/stable/climax community is reached

(b) Ways by which Nitrogen is made available to soil include:

(1) Through nitrogen fixation

(2) Through thunder storms and lightening

(3) By putrefaction/decay of organic matter

(4) By nitrification

(5) By application of artificial fertilizers

(6) By application of farmyard manure/organic fertilizers/poultry, droppings/animal dungs/green manure.

Correct Answer: D) lateral line

Explanation

Fish have a unique sensory system that helps them detect movements in the water. The question is asking which sense organ is responsible for detecting these movements. From the options given, the correct answer is the lateral line. The lateral line is a special sense organ found in fish and some amphibians. It is a series of sensory cells that run along the sides of the fish's body and detect vibrations and pressure changes in the water. These vibrations and pressure changes can indicate the presence of predators, prey, or obstacles in the water. The other options provided in the question are not responsible for detecting movements in the water. Gills are used for breathing, while the operculum is a bony structure that helps to protect the gills. Nostrils are used for smelling, and median fins are used for stability and movement. In conclusion, the sense organs responsible for detecting movements in the water in fish are located in the lateral line. It is important to understand the different sense organs in fish and how they function to help fish survive in their aquatic environment.

Correct Answer: D. AGT

Correct Answer: D. Group O has no antigen.

Correct Answer: C. 5, 7, 8