Correct Answer: D. climax community

Correct Answer: C. water and organic matter

Correct Answer: B. Crickets, houseflies and grasshoppers

Correct Answer: D. water

Correct Answer: A. spiracles of insects

Correct Answer: C. disease rate

Correct Answer: B) Fatty acid

Explanation

The question is asking us to identify the end product of the digestion of fat. The options are glucose, fatty acid, amino acid, fructose, and galactose. Out of these options, the correct answer is fatty acid. When we eat food containing fat, our body breaks down the fat molecules into smaller molecules through a process called digestion. The first step of fat digestion occurs in the mouth and stomach, where the fat is emulsified by bile and broken down into smaller droplets. These droplets then enter the small intestine, where they are further broken down by enzymes called lipases. The end product of this digestion process is fatty acids. Fatty acids are a type of molecule that can be used by our body for energy or stored as fat in adipose tissue. They are also used to build cell membranes and to produce hormones. In summary, the correct answer to the question is option B: Fatty acid, as it is the end product of the digestion of fat.

Correct Answer: D) burning of vegetation before cropping

Explanation

The question is asking which of the options is not a method of conservation. Conservation refers to the protection and management of the environment and its resources. Option A suggests replacing harvested mature timber trees with their seedlings, which helps to ensure the continuity of the timber resource. Option B is the prevention of poaching, which means stopping the illegal hunting of animals. Option C is controlling excessive deforestation, which involves preventing the indiscriminate felling of trees. Option D is the burning of vegetation before cropping, which is not a means of conservation and is the correct answer. Burning vegetation releases carbon dioxide into the atmosphere, which contributes to global warming. Therefore, it is not a sustainable method. Conservation is important for the survival of our planet. It involves the protection and management of natural resources such as forests, wildlife, and water bodies. Conservation efforts aim to ensure the long-term survival of these resources for future generations. There are many methods of conservation, including reforestation, wildlife conservation, and sustainable agriculture. It is important to protect the environment and its resources to preserve the balance of the ecosystem. In conclusion, the correct answer to the question is Option D, burning of vegetation before cropping. Burning vegetation is not a means of conservation as it contributes to global warming and is not sustainable. To learn more about conservation and its methods, please see the relevant sections of the recommended textbooks.

Correct Answer: B) secreted directly into the blood stream

Explanation

Hormones are chemical messengers produced by glands in the body that regulate various bodily functions. The question is asking which statement is correct about hormones. The options are: Option A: Secreted into the blood through ducts Option B: Secreted directly into the bloodstream (Correct) Option C: Inactive chemical substances in the bloodstream Option D: Non-specific in their mode of action The correct answer is Option B, which states that hormones are secreted directly into the bloodstream. This means that hormones are not transported through ducts, but rather are released directly into the bloodstream by endocrine glands. Once in the bloodstream, hormones travel throughout the body to their target cells and organs, where they bind to specific receptors and initiate a response. It is important to note that hormones are highly specific in their mode of action, meaning that each hormone only binds to specific receptors on specific cells or organs. This specificity ensures that hormones only affect the target cells or organs they are intended to regulate, and not other cells or organs in the body. In summary, hormones are secreted directly into the bloodstream by endocrine glands, and are highly specific in their mode of action.

Correct Answer: B. Photosynthesis