In a controlled experiment a scientist is studying how long it takes a parachute of different sizes to fall to the ground what is the manipulated variable

In what situation might natural selection maintain a recessive allele even if it is harmful

Why does cellular respiration add carbon dioxide to the atmosphere, but photosynthesis does not?

A species of mud snail was studied for five years. During this time, scientists observed the season in which they mated, the number of offspring they produced, and the results of such stressors as drought, famine, and lack of mates.

Which of the following statements is true about transport? a. Active transport does not require energy, passive transport does. b. Examples of passive transport are exocytosis, endocytosis, and sodium-potassium pumps. c.

What are the impacts to the iguanas in the Galapagos during an el Niño event?

What are three ways erosion and weathering are the same

What are all carbohydrates eventually broken down into? What is the process called that uses these broken down pieces of carbohydrate? This price is turned into broken down pieces into work final product? Why do our bodies need this final product?

A sodium atom has one outer electron and a carbon atom has four outer electrons how might this difference be related to the types of compounds formed by atoms of these two electrons

What is the most common result when heat radiation is released from Earth? A) The amount of carbon dioxide in the atmosphere increases. B) The temperature of the atmosphere decreases. C) Water vapor is produced in the atmosphere.

What is the result of a more concentrated urine?