What is the main way heat is transferred in the troposphere?

a. radiation currents
b. reflection currents
c. conduction currents
d. convection currents

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

Choose the correct words to complete the sentences related to genetic screening. is a procedure that is used during pregnancy to detect genetic defects. is extracted from the uterus and used to identify genetic disorders?

Which of the following was not a major animal on land during the carboniferous period? amphibians insects both a and b none of the above