A trait such as the various shades of skin tone in humans, ranging from the darkest black to the fairest white skin tone is caused by:

1) a mutation in the DNA

2) a blending of traits

3) many genes working together

4) none of the above

When checking a child for non-life-threatening emergencies, which action would be appropriate?

How a recessive cat fur color is hidden and the parents are purebreds

Why doesn't oil dissolve in water?

Great Elephant Census

Essential elements Classify each of the following as a nonessential element, essential bulk element, or essential trace element.

In levels of orginization within an organism what is the order of these words; element, compound, organelle, cell, tissue, organ organ system

Why is fresh water a limited resource? Groundwater is too difficult to access Most water covering Earth is salt water. The supply of water on Earth decreases over time. Too much water is wasted on irrigation

Which sentences describe the differences between photosynthesis and cellular respiration

Compared to most other substances, a great deal of heat is needed to raise the temperature of water by a given amount. This is because water A. is an acid. B. readily forms solutions. C. acts as a buffer. D. has a high specific heat capacity.

Question 1 What is used to classify the layers of the atmosphere? A Differences among temperature altitude, and weather B Differences among altitude, wind speed, and weather C Differences among temperature, air pressure, and density D How far away