What climate is characterized by a lack of warm summers with an average temperature of less than 10 °c, and covers over 20% of the earth?
a) arid
b) polar
c) tropical
d) temperate

Plz ! a scientist wants to produce a cow that makes a particular human protein in it’s milk the desired protein causes blood to clot and can be used to treat hemophilia (a blood clotting disorder). which of the following would be best for the scientist to use? a. genetic crosses. b. cloning. c. selective breeding. d. genetic engineering.

How do the evolutionary chart and the video support the claim that all living things are made up of cells?

The most famous fossil called archaeopteryx is which of the following? a dinosaur a fern a fish a bird