Which of the following is NOT one of the four main groups of macromolecules of living things?

a. proteins

c. amino acids

b. nucleic acids

d. polysaccarides

Why does liquid fall as drops?

Which describe colloids? Check all that apply. heterogeneous mixtures homogeneous mixtures may have a uniform appearance are made up of at least two substances will settle out over time

Which component of blood allows oxyg e n from the air to move from the Lungs to cell of the body?

How does soil erosion affect the environment?

If the experiment shows the original hypothesis is false, the scientist Question 4 options: should present their findings can re-state a new hypothesis will not be able to solve the problem must repeat the exact experiment again

What activity will decrease body temperature? Sweating Exercising Adding clothing Shivering

Organisms with true radial symmetry A. tend to be highly mobile. B. do not have a distinct head region and tend to be sedentary or passive drifters. C. can be divided into two matching halves along only one plane. D.

1. The Earth's carbon cycle consists of the flow, cycling, and recycling of all of the carbon on the Earth. Every living organism's composition includes the element carbon. How does carbon become part of living organisms?

Which of these is used to find the precise age of a rock? Index fossils Radioactive dating Relative dating Stratified rock layers

Mi ola designs swimsuits for women who are athletic in the water, and the swimsuits have design features that allow them to stay on during physical activity. this indicates that mi ola has a. check all that apply.