Correct Answer: A. plasmolysed

Correct Answer: C. anemometer

Correct Answer: C) cilium

Explanation

Paramecium is a single-celled organism that belongs to the group of organisms called protozoa. It moves by using hair-like structures called cilia, which are found all over its body. The question is asking which organelle in paramecium is used for locomotion. Option A, pseudopodium, is not the correct answer because pseudopodia are temporary projections of the cell membrane and cytoplasm that are used for movement in some other organisms, such as amoeba. Option B, trichocyst, is not the correct answer because trichocysts are tiny, bottle-shaped structures that are used for defense in paramecium. Option C, cilium, is the correct answer because cilia are the hair-like structures that are found all over the body of paramecium and are used for locomotion. Each cilium is made up of microtubules that extend from the cytoplasm and are covered by a membrane. Option D, pellicle, is not the correct answer because the pellicle is a stiff, protective covering that surrounds the cell membrane in paramecium and provides support. Option E, contractile vacuole, is not the correct answer because contractile vacuoles are organelles that are used for maintaining water balance in paramecium and other single-celled organisms. In summary, the correct answer to the question is Option C, cilium, because it is the organelle that is used for locomotion in paramecium.

Explanation

(a)(i) The four levels of organisation in living: organisms are: Cell, tissue, organ, system

(ii)A cell is a basic structural and function unit of life; it is bounded by a membrane containing nucleus and cytoplasm. Some cells are capable of independent existence, carrying out all the characteristics or life processes in living things. They may have processes like pseudopodia, cilia, flagella, etc. Cells also have inclusions, referred to as organales.

A tissue is a collection of cells which are similar in structure and perform similar functions. Some tissues cannot exist on their own but some can live on their own, e.a., Hydra. They have the same origin and occupy the same position in the body of the organism.

An organis a collection of different tissues that perform a common function or functions. Some organs carry out a single function. e.g., heart while others carry our more than one function, e.g., kidney.

A system; is made up of different organs that perform a particular function. Systems are peculiar to higher organisms.

Correct Answer: C. Pteridophyta

Correct Answer: C. enables the leaf to store the starch

Correct Answer: C. nitrogen

Correct Answer: D) annual species

Explanation

This Biology question is asking about the term used to describe a community of plants where the same species occur from year to year. The correct answer is Option B, which is climax species. Climax species refer to the stable community of plants that exists in a particular area, where the same species occur from year to year. This community is in a state of equilibrium, meaning that there is a balance between the different plants and animals in the ecosystem. The climax community is typically dominated by large, long-lived plants that are well adapted to the local environment. These plants are able to maintain a stable community over time, despite disturbances such as fires, floods, or other natural disasters. In contrast, pioneer vegetation refers to the first plants that colonize a new area, often after a disturbance such as a fire or landslide. These plants are typically fast-growing and short-lived, and they are replaced over time by other species that are better adapted to the local environment. Annual species, as the name suggests, complete their life cycle in a single year, while perennial species live for several years. Understanding the concept of climax species is important because it helps us to appreciate the complex interactions between different plants and animals in an ecosystem. By studying how different species interact with each other and with their environment, we can gain a better understanding of how to protect and conserve these fragile ecosystems for future generations.

Correct Answer: C. volume of cell decreases

Correct Answer: B) locomotion

Explanation

protection D) excretion Related Lesson: Human Locomotion | Animal Systems The correct answer is B. Explanation: Paramecium is a type of unicellular organism that has tiny hair-like structures called cilia on its surface. These cilia are used for various functions, such as movement, feeding, and sensing the environment. In this question, we are asked to identify the primary function of the cilia in paramecium. Option A suggests that the cilia are used for respiration, which is not correct. Paramecium obtains oxygen through its cell membrane and does not have specialized respiratory structures. Option B, which is the correct answer, suggests that the cilia are used for locomotion. This is true as the cilia beat in a coordinated manner to propel the organism through its environment. Option C suggests that the cilia are used for protection, which is not correct. Paramecium has other structures for defense, such as trichocysts, which are specialized organelles that can discharge a protective substance. Option D suggests that the cilia are used for excretion, which is not correct. Paramecium excretes waste through specialized structures called contractile vacuoles. Therefore, the correct answer is Option B, which states that the cilia in paramecium are used for locomotion.