Snowshoe hare and Canadian lynx live in the boreal forest of Canada. The snowshoe hare is the main prey species of the Canadian lynx. They usually live 1 to 2 years and have four to six offspring at one time. The Canadian lynx is a large cat, which lives up to 15 years and has one to four cubs each year. In spring when vegetation is plentiful, the hare population increases quickly. When the hare population becomes more numerous, they are easy to track and catch, and the Canadian lynx population increases. The Canadian lynx hunts the snowshoe hare and causes their population numbers to drop over time. When the hare population increases, it is easier for the lynx to find and take a member of that population. This is an example of a:.
a) density-independent factor
b) community factor
c) growth factor
d) density-dependent factor

Acladogram is a branching diagram that represents suggested evolutionary relationships among organisms based on the presence of unique traits. a scientist discovers a new organism that lacks limbs and does not have a true backbone. the organism lays eggs to produce offspring and has a cartilage-like rod known as a notochord running along its dorsal surface. on the cladogram below, select the species to which the newly discovered organism is most closely related.

Every compound can be represented by a chemical formula. a chemical formula is the set of symbols showing the elements that make up a compound and their proportions. water’s chemical formula is h 2 2 o. that means a molecule of water contains two atoms of hydrogen and one atom of oxygen chemically bonded. a molecule is a group of two or more atoms bonded together. molecules can range in size from two to thousands of atoms. a molecule of a compound is the smallest unit of that compound. every molecule of water has all the physical and chemical properties of water. that’s because every molecule of water is made of the same elements in the same proportions: two hydrogen atoms and one oxygen! which of the following is a true statement? a every molecule of the same compound will have different properties. b every molecule of a compound has the same proportion of elements. c molecules can be physically separated into smaller units of a compound. d molecules cannot be represented by chemical formulae.

How do accessory pigments chlorophyll?