Question 1(Multiple Choice Worth 2 points) (12.04 MC) Two environmental changes are described below: Environmental change 1: Many small tree saplings are competing for sunlight on the forest floor. Environmental change 2: Many bluebirds have become ill with the infectious West Nile virus. Which statement is true about these environmental changes? Environment change 1 is increased predators and environmental change 2 is climate change. Environment change 1 is pollution and environmental change 2 is disease. Environmental change 1 is reduced space and environmental change 2 is disease. Environmental change 1 is reduced space and environmental change 2 is lack of food.

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Harold makes a venn diagram to him compare and contrast mitosis and meiosis. which label belongs in the region marked z? forms diploid cells creates an even number of cells includes two rounds of cell division duplicates body cells

What type of cell is produced after fertilization occurs and the gametes combines ?