What do scientists estimate is the approximate age of the planet earth? A) 660 million years B) 3.5 billion years C) 4.6 billion years D) 12.2 billion years

What characteristics of an atom determines its properties?

A gardener uses a chemical to kill the bacteria in the soil of his flowerbed. How will this plan affect the growth of his flowers?

1. Parents got their chromosomes from your grandparents, and so on. But are the chromosomes that are passed along through the generations exactly the same? 2.

How does hydrogen bonding between water molecules affect the properties of water? a) it causes a negative charge on the oxygen and hydrogen atoms; b) it enables water molecules to stick to each other and to many other things.

A small group of rodents have a ride on an island in the Pacific ocean where there is no rodents or naturally found this small group may rapidly evolving into seven different sub species to take a vantage of difficult means of survival which term is

The small outpouchings that protrude from the intestinal lumen are called

There are 5 major types of asexual reproduction. Name all 5 and give an example of each.

Time/Temperature Control for Safety Food (TCS)

The purpose of this exercise is to demonstrate the comparative effect of uv on two (or three) bacterial populations. this could have been accomplished without the cardboard cover. why was the cover used?

Which traight was important in the advancement of modern fish