1. Answer;
-Cells
Cells are the basic units of structure and function in living things.
Explanation;
-Cells are the basic building blocks of all living things. They are the smallest and basic units of life. Cells consist of cytoplasm enclosed within a membrane, which contains many bio-molecules such as proteins and nucleic acids and organelles that carry out various activities of a cell.
2. Answer;
-Tissue
A tissue is a group of similar cells that perform a specific function in an organism.
Explanation;
-Tissues are groups of cells that have a similar structure and act together to perform a specific function.
-In human body there are four main types of tissue: muscle, epithelial, connective and nervous. Each is made of specialized cells that are grouped together according to structure and function.
3.Answer;
Motor neurons
Motor neurons are nerve cells that carry response information to muscles and organs.
Explanation;
Motor neurons are a specialized type of brain cell called neurons located within the spinal cord and the brain. Motor neurons carry impulses from the Central nervous system to the effector organs , mainly muscles and glands.
-The cell body of the motor neuron is located in the CNS and their axons projects to the spinal cord or outside of the spinal cord to directly or indirectly control effector organs.
4. Answer;
Energy
Carbon dioxide and energy are outputs of cellular respiration.
Explanation;
-Cellular respiration is the process that takes place in the mitochondria of a cell that breaks down nutrients such as glucose to release energy in form of ATP and carbon dioxide and water as by products.
-The energy released from cellular respiration is used to drive cellular processes such as growth, reproduction and transport among others.
5. Answer;
-Water
Water is essential to living things because many of the chemical reactions that occur in living things require it.
Explanation;
-Water is vital for the survival of living organisms. All plants and animals must have water to survive. If there was no water there would be no life on earth. Water helps dissolves minerals and other nutrients in the body and also carries nutrients and oxygen to cells in the brain and other parts of the body.
6. Answer;
-Microscope
Scientists did not discover the cell until the microscope was invented because cells are too small to see without one.
Explanation;
- Microscopes are devices that are used to observe very tiny substances or organisms that we can not see with our naked eyes.
-Discovery of microscopes played a major role in the discovery of cells. The cell was first discovered by Robert Hooke in 1665 using a microscope.
