Frogs have lungs for breathing, but they also absorb dissolved oxygen directly through their skin. this allows respiration to occur when they are underwater. when they are on land, mucus keeps their skin moist to continue to absorb dissolved oxygen from the air. which statement about water is best illustrated by this example?

a) liquid water can transport nutrients
b) water breaks down into oxygen molecules for respiration
c) water is found in every cell of an animal’s body
d) liquid water is necessary for plants and animals

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.

In 2015, about ten percent of total u. s. energy consumption was from renewable energy sources. renewable energy plays an important role in reducing greenhouse gas emissions. when renewable energy sources are used, the demand for fossil fuels is reduced. sanjay and his family want to cut back on their use of non-renewable resources at home. they are thinking of an alternate way to heat their home without adding more greenhouse gases or pollutants to the environment. which renewable resource would not fit into their plan? a) solar power b) burning wood c) constructing a wind turbine eliminate d) generating hydroelectric power

What is it called when part of a cell membrane closes around a molecule to allow the molecule to enter the cell? a. passive transport b. diffusion c. endocytosis d. exocytosisc. endocytosis