Answer:
The skeletal system provides the shape and form for our bodies in addition to supporting and protecting our bodies, allowing bodily movement, producing blood cells, and storing minerals. This system consists of bones, cartilage, and joints.
The primary function of the respiratory system is to supply the blood with oxygen in order for the blood to deliver oxygen to all parts of the body. The respiratory system does this through breathing. It consists of the nose, larynx, trachea, diaphragm, bronchi, and lungs.
Answer:
In science a hypothesis is useful only if it can be <u><em>tested</em></u>.
Explanation:
In a scientific experiment, a hypothesis can be described as a tentative experiment that can be tested through observations and experimentation. The results inferred from the experiments can prove whether a hypothesis was correct or wrong. Hence, a hypothesis is a very important part for the scientific method of research. The validation of a hypothesis through experimentation brings about theories, facts, laws etc. A hypothesis is made in response to a scientific question.
The right answer is hydrophilic.
Phospholipids are amphiphilic lipids which means that one side is hydrophilic (the glycerol phosphate portion) while the other side is hydrophobic (fatty acids). Thus, if placed in water, the phospholipids will be organized in such a way that only the hydrophilic zone will be in contact with the water. If they are forced to mix with this liquid, they will form a lipid bilayer in which the hydrophobic fatty acids face each other. The plasma membranes of cells and organelles are moreover constituted in this way.
Most animal and plant species we see in the fossil record are extinct, or no longer living. In fact, of all the species that ever lived, 98% are extinct. Animals and plants become extinct over time as a result of natural processes. Their habitat might change or a disease might wipe out a species.
