4. The atmosphere trags warmth like a blanket, this keeps the Earts moderate virich allows for humans to eist
A)water levels
B)temperature
C)carbon diokide levels
D)orygen levels

During the day, plants produce by splitting water molecules in the light-dependent reactions of photosynthesis. at the same time, plants use cellular respiration to produce some of the needed by the light-independent reactions to make sugars. during the night, plants produce because takes place.

To determine if a particular plant is homozygous or heterozygous, you would have to test cross with a

Which of the following best describes the expensive tissue hypothesis? brains require more energy, so the gut had to be reduced, and larger brains and tool use led to higher quality diets. increasing body size means that homo neanderthalensis had to include more fat in its diet. brains require more energy, so the gut had to be reduced as brains got bigger. brains require more fat, so the gastrointestinal viscera (gut) had to expand, and hands were needed to acquire more food.