Correct Answer: C. Cyclosis

Correct Answer: A. meristem

Correct Answer: C) gall bladder, pancreas & spleen

Explanation

This Biology question is asking about the three important organs that are located near the stomach. The options provided are: liver, kidney & gall bladder (Option A), pancreas, liver & kidney (Option B), gall bladder, pancreas & spleen (Option C), liver, kidney & spleen (Option D), and kidney, gall bladder, liver (Option E).The correct answer is Option C: gall bladder, pancreas & spleen. These three organs are situated close to the stomach and play important roles in the digestive system. Th

Correct Answer: D. Detoxification and metabolism of nutrients and drugs

Explanation

The liver is a vital organ in the human body with multiple functions, but its primary function is the detoxification and metabolism of nutrients and drugs. The liver plays a crucial role in various metabolic processes. It detoxifies harmful substances, such as drugs and toxins, by breaking them down into less harmful forms that can be eliminated from the body.

Correct Answer: D. AGT

Correct Answer: C. Breeding of plant

Correct Answer: B. DNA analysis

Correct Answer: C) Nephriduim

Explanation

In Biology, excretory organs are responsible for removing waste products from the body. The question is asking us to identify the excretory organ in the earthworm. The options provided are Malphigian tubule, Stoma, Nephridium, Flame cells, and Gills. We need to choose the correct option that represents the excretory organ in the earthworm. Option A, Malphigian tubule, is the excretory organ found in insects, not earthworms. Option B, Stoma, is responsible for gaseous exchange in plants, not earthworms. Option D, Flame cells, are found in the excretory system of flatworms, not earthworms. Option E, Gills, are respiratory organs in aquatic animals, not earthworms. Therefore, the correct answer is Option C, Nephridium. Nephridia are the excretory organs in earthworms responsible for filtering waste products from the coelomic fluid and excreting them through pores called nephridiopores located on the body wall. Understanding the excretory system of earthworms is important in the study of animal physiology and helps us understand how different organisms have adapted to survive in their environments.

Explanation

(a). The characteristics of Northern Guinea Savanna are:

(i) It has bare soil with scanty trees.

(ii) Has long twisted roots to facilitate the absorption of water and mineral salts.

(iii) Possesses thick barks which enable it to withstand harsh weather, e.g. fire and intensive sunlight.

(iv) Has twisted and gnarled trunks, which enable it to resist fire and excessive transpiration.

(v) Availability of herbivorous animals such as zebra, squirrel, antelope, grasscutter etc.

(vi).Availability of perennial grasses that grow in tufts and resist fire.

(vii) Presence of underground stems, e.g. spear grass which make the plants to be able to survive, after long period of dry season or fire out break.

(viii) Temperature is usually above 18°C throughout the year.

(ix) Trees shed their leaves during the dry season and this enables them to conserve water.

(b)Aim: To estimate the density of a plant species using quadrat sampling technique (a method of studying plant species).

Method: A quadrat is a rectangular frame which is constructed from wire or wood of known dimension. Before usage, mark the area where the species to be measured occurs. Then throw the quadrat to land randomly on any part of the marked off area. Note the area covered at each landing of the quadrat. In the process, each species of plant is counted and recorded. To determine the density, calculate the average frequency of the plant species as the number of times the plant species occurs divided by the total number of quadrat throws made.

Formula= Number of times plant species occurs

Total number of quadrat throws made

Finally, divide the average frequency by the area of the quadrat =

Average Frequency

Area of quadrat .

Correct Answer: D. removal of the waste products of metabolism