Correct Answer: B. hold talks

Correct Answer: C. potential energy

Explanation

Examples of scalar quantities are mass, distance, charge, volume, time, speed, and the magnitude of physical vectors in general.

The moment of inertia is a scalar quantity.

Correct Answer: C. Mansa Musa

Correct Answer: D. Murtala Muhammed

Correct Answer: B. over a narrow range of temperature

Correct Answer: B. dispersed

Explanation

(a) Activities of man that pollute water bodies are:

(1) dumping of household refuse or organic wastes into water bodies

(ii) oil spillage from drilling or tankers

(iii) thermal pollution, hot water from industrial plants and atomic reactors

(iv) dumping of agro chemicals, e.g. fertilizers, pesticides, fungicides etc

(v) dumping of dye from textile factories into water

(vi) pouring detergents from homes and factories into water bodies

(vii) pouring tannins from leather factories into water bodies

(viii) radiations or radioactive fall-outs from nuclear plants washed into water bodies

(ix) untreated sewage dumped into water bodies

(x) use of dynamites/explosives for fishing

(xi) use of chemicals (Gamalin/DDT) in fishing.

(b) Measures for preventing pollution of water bodies are:

(1)Treatment of raw sewage before discharging into water and prohibition of disposal of human waste into water bodies

(2)Refuse must be burnt or buried and must not be deposited into water bodies

(3)Recycling of industrial waste before discharging them into water.

(4) Wastes should be discharged in controlled amounts.

(5) Cooling of water from industrial plants before discharging

(6) Proper sewage treatment

(7) Using biodegradable detergents in controlled amounts

(8) Limiting the use of pesticides and fertilizers

(9) Spraying oil with detergents to spread it or cover oil with chalk powder to cause it to sink and speed up bacteria decomposition/efficient method of preventing oil spillage

(10) Proper education of farmers on correct usage of fertilizers to limit run-off into water bodies

(11) Enactment/enforcement of laws to prevent the use of explosives and chemicals in fishing. The methods of purifying water are: boiling, addition of chemicals, e.g. alum, and chlorination; filtering; distillation; sedimentation and boiling; sterilization, e.g. by using u. v. light

Correct Answer: A) Parthenocarpic fruits

Explanation

This question is asking about fruits that develop without fertilization and are seedless. These types of fruits are known as parthenocarpic fruits. Parthenocarpic fruits are able to develop without fertilization because they are produced by the ovary without the need for male gametes. This can happen naturally or through human intervention such as using hormones or other chemicals to induce parthenocarpy in crops. It's important to note that while parthenocarpic fruits do not have seeds, they can still be sold and consumed. Some examples of parthenocarpic fruits include bananas, seedless grapes, and seedless cucumbers. Understanding the different types of fruits is important in Biology. Simple fruits, for example, are fruits that develop from a single ovary in a flower, while aggregate fruits develop from multiple ovaries in a single flower. Epicarpic fruits refer to the outermost layer of a fruit, while mesocarpic and endocarpic fruits refer to the middle and inner layers, respectively. In summary, the correct answer to this question is option A: parthenocarpic fruits. These fruits develop without fertilization and are seedless. Understanding the different types of fruits is important in Biology and can help us better understand plant reproduction and the food we eat.

Correct Answer: B. Identity Theft

Correct Answer: C. badama