Chapter 2 Science: Parts Of Living Things

The correct answer is leaves, stems and roots. These are the three main organs of a plant. Leaves are responsible for photosynthesis and gas exchange. Stems provide support, transport water and nutrients, and allow for the growth of leaves and flowers. Roots anchor the plant in the soil, absorb water and minerals, and store food.

The correct answer is "arms, legs wings, fins". These are all body parts that are capable of movement. Arms and legs are found in many animals, including humans, and are used for walking, running, and grasping objects. Wings are found in birds and some insects, and are used for flying. Fins are found in fish and other aquatic animals, and are used for swimming and maneuvering in water. All of these body parts have joints or other mechanisms that allow for movement.

The correct answer is eyes, ears, nose, skin, tongue, leaves, roots. These are all parts that can receive or gather information from the environment. Eyes can see and perceive visual information, ears can hear sounds, nose can detect smells, skin can feel touch and temperature, tongue can taste different flavors, leaves can absorb sunlight and carbon dioxide for photosynthesis, and roots can absorb water and nutrients from the soil.

The heart, liver, brain, and stomach are called organs because they are distinct structures within the body that perform specific functions. Organs are made up of different types of tissues and work together to carry out vital processes necessary for survival.

Feathers and fur are two outer coverings that keep organisms warm. Feathers are found in birds and provide insulation by trapping air close to the body, creating a layer of warm air. Fur, on the other hand, is found in mammals and serves a similar purpose by trapping air and providing insulation. Both feathers and fur help regulate body temperature and keep organisms warm in cold environments.

A system is a group of parts that work together. In the context of the question, the other options (cytoplasm, cell membrane, nucleus) do not accurately describe a group of parts working together. The correct answer, system, is the most appropriate choice as it encompasses the concept of multiple components functioning together to perform a specific task or achieve a common goal.

The nucleus is the main control center found in plant and animal cells. It contains the cell's genetic material, including DNA, which controls the cell's activities and determines its characteristics. The nucleus also regulates the cell's growth, reproduction, and metabolism. It is surrounded by a nuclear membrane that separates it from the rest of the cell, allowing it to carry out its functions independently. The nucleus plays a crucial role in maintaining the cell's overall structure and function.

A microscope is needed to see the parts of a cell because it allows for magnification and resolution at a level that is not possible with the naked eye. A magnifying glass, telescope, and binoculars do not have the necessary magnification power or resolution to observe the minute details of a cell. A microscope is specifically designed for studying cells and other microscopic organisms, enabling scientists to see their structures and functions in detail.

Cytoplasm is a clear jelly-like material that fills plant and animal cells. It is responsible for supporting and protecting the cell's organelles, such as the nucleus, mitochondria, and ribosomes. It also plays a role in cellular processes, such as metabolism and protein synthesis. The cytoplasm contains various molecules, ions, and nutrients necessary for cell function.

Chloroplasts are the organelles found in plant cells that contain chlorophyll, the pigment responsible for capturing sunlight and converting it into energy through photosynthesis. This process allows plants to produce food in the form of glucose. Therefore, the presence of chloroplasts in plant cells is crucial for their ability to make food.

A substance found in nature that is not a plant or an animal is called a mineral. Minerals are naturally occurring inorganic substances with a definite chemical composition and a crystalline structure. They are formed through geological processes and can be found in rocks, soil, and water. Unlike plants or animals, minerals do not possess cellular structures or exhibit biological characteristics. Therefore, mineral is the correct answer in this context.

A group of cells that are alike is called tissue. Tissues are made up of cells that have similar structures and perform similar functions. They work together to carry out specific tasks in the body.

The correct answer is skin and scales. Both skin and scales serve as outer coverings in various animals, such as fish and reptiles. These coverings are designed to be waterproof, preventing water from entering the body and keeping the internal organs protected. The skin acts as a barrier, while scales provide an additional layer of protection and help in reducing water loss.

Heart tissue is made up of heart cells only. This tissue is specific to the heart and is responsible for the contraction and relaxation of the heart muscles, allowing it to pump blood throughout the body. The other options mentioned, such as liver, leaves, and blood, do not consist solely of heart cells and therefore cannot be considered as the correct answer.

Cellulose is a complex carbohydrate that provides structural support to plant cells. It is a major component of the cell walls in plants, giving them strength and rigidity. Animal cells do not have cell walls made of cellulose. The other options, walls of houses and boogers in the nose, are not sources of cellulose. Therefore, the correct answer is walls of plant cells.

The correct answer is "roots, leaves, mouths, noses, skin". These are the parts of living organisms that take in materials. Roots absorb water and nutrients from the soil. Leaves take in carbon dioxide and sunlight for photosynthesis. Mouths are used for ingesting food. Noses are used for inhaling air and detecting smells. Skin absorbs certain substances and helps regulate body temperature.

An organ is a group of tissues that work together. Tissues are a group of cells that work together, but an organ is a higher level of organization that consists of multiple tissues working together to perform a specific function. Systems, on the other hand, are groups of organs that work together to perform a specific function in the body. Therefore, organs are the correct answer as they are the intermediate level between tissues and systems in the hierarchy of organization in the body.

Plant cells have walls made mostly of cellulose. The cell wall is a rigid layer that surrounds the cell membrane and provides support and protection to the cell. It is composed primarily of cellulose, a complex carbohydrate that gives the cell wall its strength and structure. The cell wall also allows for the exchange of materials between adjacent cells and helps maintain the shape of the plant. Therefore, the correct answer is "walls".

The correct answer includes parts that protect and support the body. Stems provide support for plants, while skin protects the body from external elements. Bark acts as a protective layer for trees, while shells provide protection for certain animals. Feathers and scales protect and insulate birds and reptiles, respectively. Lastly, bones provide structural support and protect organs in animals.

The thin outer covering of plant and animal cells is called the cell membrane. The cell membrane is a semi-permeable barrier that surrounds the cell and separates its internal environment from the external environment. It controls the movement of substances in and out of the cell, allowing nutrients to enter and waste products to exit. The cell membrane also plays a crucial role in cell communication and signal transduction.

An organ is like the room of a house because just like a room serves a specific function in a house, an organ serves a specific function in the body. Organs are made up of different tissues and cells that work together to perform a particular task, just like a room is made up of different elements like walls, furniture, and appliances that serve a specific purpose within the house.

A tissue is like the wall of a house because it is a group of cells that work together to perform a specific function, just like the wall of a house provides structure and support. Tissues are organized into organs, just as walls are part of the overall structure of a house.

Plant cells are usually bigger than animal cells because they contain a large central vacuole that takes up most of the cell's volume. Animal cells, on the other hand, have smaller vacuoles or none at all. Additionally, plant cells have a box-shaped structure due to their rigid cell walls, which provide support and protection. Animal cells lack a cell wall and have a more rounded shape.