Which occurs during the second stage of photosynthesis? select one: a. chlorophyll collects light energy within the chloroplasts. b. carbon dioxide is taken in from the air through the stomata. c. water molecules brought up from the soil are split into hydrogen and oxygen. d. oxygen is given off as a waste product through the stomata.

Modern whales developed their traits through natural selection what occurs during the process of natural selection

What molecules does hemoglobin decay into over time

Which statements best describe the differences or similarities between a comparative investigation and an experimental investigation? check all that apply. experimental investigations are best for showing cause-and-effect relationships, while comparative investigations do not necessarily show this type of relationship. comparative investigations are often impractical and unrealistic, while experimental investigations are the most practical and realistic kinds of investigations. comparative investigations allow for the use of a wide range of variables but do not have a control group, while experimental investigations involve variables that can be controlled. both experimental investigations and comparative investigations are designed to answer scientific questions. both experimental investigations and comparative investigations focus on making observations rather than collecting new data.