Answer: C. The particle is a virus because it has genetic information and can infect humans.
Explanation: edmentum answer coreect
Answer:
because it cools you off when its too warm and overall gives a sense of calm
Answer:
D. Beautiful leaves
Explanation:
All of the other answers are factual. However, something such as beauty can only be decided in an opinionated and biased way.
The answer is mutagens. In genetics, mutagen is a physical or chemical agent that changes the genetic material usually that of DNA of an organism and thus increases the frequency of mutations above the natural background level. DNA changes caused by mutagens may harm cells and cause certain diseases such as cancer.
Answer: the statements are not given, so I will state the role of calcium in plants.
Calcium pectate, is responsible for holding together the cell walls of plants, it is also used in activating certain enzymes and to send signals that coordinate certain cellular activities in plants. Calcium helps to maintain chemical balance in the soil, it reduces soil salinity, and improves water penetration within soil.
When there is calcium deficiency, it leads to localized tissue necrosis causing stunted plant growth, dead leaf margins or curling on the leaves, and eventual death of terminal buds and root tips of the soil/plant.
Excess levels calcium in the soil can reduce a plant's uptake of other important nutrients such as phosphorus, magnesium, boron, potassium, copper, zinc or iron, leading to deficiencies of these nutrients.