Animal science
1. what species of animals come into heat as the days get shorter
2. at what moment does the ovulation occur within the ovary
3. what supplies nutrients to the fetus during development
4. in what portion of the reproductive tract is the egg fertilized
5. for how long can poultry can store semen
6. what is one function which the vulva and the sheath share
7. what produces the ovum or egg

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

Name one similarity and one difference between the morphology of a brachiopod and a bivalve

How does friction with the atmosphere affect the speed of an artificial satellite