What economic system is characterized by an exchange of one product for another

currency

barter

loan

free market

Changes in allelic frequency are always driven by natural selection.

Describe how the processes that cause winds along the shore affect the climate of the shore. (How does the heating and cooling of the water and the sand affect the climate?)

What is produced by any parent cell that undergoes mitosis? A. two haploid cells B. four haploid cells C. two diploid cells D. four diploid cells

There are 64 codons and 20 amino acids. which of the following is true. A: several different codons can specify the same amino acid.

Suppose someone told you that a jungle cat is classified in the same genus as a house cat. what characteristics and behaviours do you think a jungle cat might have?

Can your body make antibodies for pathogens that you have never been in contact with

What allows an organism to better survive in its envirmoment

The ozone hole is largely a consequence of the use of

Choose all the answers that apply. According to the rock cycle, sedimentary rock can change into what? 1. other sedimentary rock 2. igneous rock 3. metamorphic rock

The organism shown is a free-living one that is anchored to the bottom of ponds and streams during the first part of its life cycle. What is the common name of this organism? jellyfish hydra coral anemone