All living things need energy to perform their life processes. how and where do they get the energy that they need?
a.
the fixation of nitrogen gas from the atmosphere
b.
the oxidation of food through the process of cellular respiration
c.
the absorption of light that radiates from the moon
d.
the production of carbon dioxide through the process of photosynthesis

What is the primary function of the nervous system?

This is collection of data made by comparing objects in standard units. in science, the units are metric.

Even though the ostrich is a flightless bird, ostriches still possess wings that stretch approximately two meters across when fully extended. scientists speculate that when dinosaurs became extinct, some of the birds that lived during that time became land dwellers since they were able to consume the food that the dinosaurs once ate. over time, these species grew larger and heavier. eventually, the ostrich species became too big to fly. the wings found on ostriches are known as a. analogous structures. b. homologous structures. c. vestigial structures. d. symmetrical structures.