The correct statement about the structure of 2 molecules estrogen (female sex hormone) and testosterone (male sex hormone) A. The two molecules differ only in the functional group attached to a carbon skeleton consisting of four sticky rings
together.
B. Two molecules that differ in the number of functional groups and the carbon skeleton
C. Although the two molecules differ in functional groups, they do not affect physiology
between male and female vertebrates.
D. The –OH group is more important than other functional groups in sex hormones

Which table best shows the impacts resulting from human activity? impact of human activities human activity impact forest area cleared to construct an airport increase in oxygen level vegetation cleared to construct an oil mine increase in pollution impact of human activities human activity impact forest area cleared to construct an airport increase in sound pollution vegetation cleared to construct a power plant contamination of water impact of human activities human activity impact beehives cleared from urban areas increase in vegetation dams constructed on a river increase in fish population impact of human activities human activity impact beehives cleared from urban areas increase in bird population dams constructed on a river better quality of water

What makes the results of a scientific experiment accurate? a) having multiple trials b) lacking any supporting data c) working in a lab d) using a hypothesis that is always true

The large increase in atmospheric carbon dioxide in the last 50 years most likely comes from a. an increase in cellular respiration b. increased decomposition by bacteria c. an increase in the burning of fossil fuels d. an increase in photosynthesis