Answer: Can you say which five scenarios is the project talking about-?
Answer:
peptide antigens by MHC class II molecules
Explanation:
Helper T cells are activated by peptide antigens by MHC class II molecules. These antigens express on the surface of antigen-presenting cells (APCs). After activation, the T helper cells divide and secrete cytokines to assist the immune response.
Answer:
a niche is a specific area if habitation where an orgnism perfoms its daily activities
Answer:
D. The scientist uses tennis balls to show the position of the planets and Sun.
Explanation:
In a layman's terms, the solar system is a system consisting of the sun and the planets that orbits around it. These planets are as follows; Mercury, Mars, Earth, Saturn, Venus, Jupiter, Neptune, Uranus etc.
According to this question, using a physical model to represent or describe the solar system means the use of physical objects that can easily be seen or identified. Based on this explanation, the use of tennis balls to show the position of the planets and Sun suits the physical model description of our solar system.
Answer:
See below
Explanation:
Do not keep the tap running, when washing your hands.
Do not shower every day.
When showering, get in, shut the tap down. While still wet in the shower, but without the water running, start to apply soap and shampoo. Wait a bit and the start the water again to wash it all off. Get out asap.
Do not keep the hose running, when cleaning your car.
Preferably, do <em>not</em> use a hose, but use a broom, to clean the driveway or sidewalk.
Cover the swimming pool, in order to reduce extensive evaporation.
Check for leaks in pipes, hoses, (dripping) faucets and couplings.
If at all possible, reuse wastewater as much as you can.
