1) B
(I'm not so sure of this one) All of the other options have a steady impact on population regardless of the density of organisms except competition
2) D
Increased carbon dioxide levels would not hinder plant growth, and tsunamis aren't really linked to carbon dioxide levels. Increased carbon dioxide is unlikely to lower the air temperature so only D is left.
3) A
4) Three properties of water that allow it to sustain life are that it is adhesive, it is a good solvent, and cohesion. Adhesion is important in situations such as water travelling up xylem tubes in plants so that the water is not pulled down by gravity and can reach parts of the plant that need water. Cohesion allows the water being pulled up the xylem to stay together and for water molecules to be pulled when a neighbouring one is moved. Water being a good solvent allows inorganic minerals to be taken with water through vascular tissue, such as in the previous example.
Answer: Eating a diet high in saturated fats, trans fats, and cholesterol has been linked to heart disease and related conditions, such as atherosclerosis. Also too much salt (sodium) in the diet can raise blood pressure. Not getting enough physical activity can lead to heart disease.
Explanation: Diet is an important risk factor in coronary heart disease. Heavy drinking may well increase heart attack, heart failure, stroke, and high blood pressure. A limit for men is 2 drinks a day, for women 1 drink a day.
Answer: the correct answer is A) All plants should be the same age and health and be given equal amounts of water and sunlight.
Answer:
The correct answer is - option A.
Explanation:
Price floor is a minimum price determined by the government at which a particular item can be sold. It is legal to sell the item on the minimum price which is often imposed by the government when farmers or sellers of the item convince that market price is not fair without a price floor.
In this case the farmers are farmers use improved, drought resistant seeds, which lowers the cost of growing soybeans which can transform the price floor.
Thus, the correct answer is - option A.
