Correct Answer: C. viruses

Correct Answer: A. Competition can occur within a species and between species.

Explanation

The term refers to all living organisms and can directly or indirectly lower the fitness of the other individual. A competitor may or may not go extinct. It is also possible that one species or community will exploit a slightly different niche over time to avoid competition or lessen its effects or the affect of competition may be enough to reduce population numbers but not cause the species to go extinct entirely.

Correct Answer: B) respire

Explanation

This question is asking which of the given options is a characteristic of all living things. The options are photosynthesize, respire, move, transpire, and feed. Out of all the options given, the correct answer is B: respire. This means that all living things undergo respiration. Respiration is the process by which living things convert glucose and oxygen into energy, carbon dioxide, and water. It is a vital process that all living things, from unicellular organisms to complex organisms like humans, undergo. Although not the correct answer, it is also worth noting that photosynthesis is a process that is unique to plants, algae, and some bacteria. It is the process by which these organisms use light energy to convert carbon dioxide and water into glucose and oxygen. As for the other options, movement is a characteristic of some living things, like animals, but not all. Transpiration is a process that is unique to plants, where water is lost through small pores on their leaves. Feeding is also a characteristic of living things, but not all living things feed in the same way. Some, like plants, use photosynthesis to produce their own food, while others, like animals, consume other organisms for food. In summary, the correct answer to this question is B: respire, as all living things undergo respiration to produce energy.

Correct Answer: C. lightning and nitrification

Correct Answer: A. sunlight

Correct Answer: A. both parent possess genes for shortness

Correct Answer: D. Hypothalamus

Explanation

The correct answer is hypothalamus. The hypothalamus is made of nervous tissue and is a part of all vertebrate brains, placing it as part of the nervous system. It also secretes a number of hormones that directly affect the pituitary gland, affecting a large number of bodily functions. In this way, the hypothalamus connects the nervous and endocrine systems and is part of both of them.

Correct Answer: B. hydrogen bond

Explanation

Hydrogen bonds form between the nitrogenous bases in one strand and the nitrogenous bases in the other strand of DNA

Correct Answer: D. the composition and size of a community remains constant over a long period

Correct Answer: B) It refers to either the plants or animals

Explanation

The question is asking about the meaning of individual organism. The options are A, B, C and D. Option A says that it refers to animals only, option B says that it refers to either plants or animals and is the correct answer. Option C says that its ecology can only be studied in zoos and option D says that it is used in reference to plants only. An individual organism refers to a single living thing, whether it is a plant or an animal. It can be a tree, a dog, a bird or a human being. It is an independent living being that can carry out all the basic life processes on its own. Therefore, option B is the correct answer as it says that an individual organism can refer to either plants or animals. Option A is incorrect because an individual organism can refer to both plants and animals. Option C is incorrect because an individual organism can be studied in various environments, not just in zoos. Option D is also incorrect because an individual organism can refer to both plants and animals. Understanding the concept of individual organisms is important in the study of biology as it forms the basis for understanding the characteristics and behavior of living things.