Which of the following is one observation that Charles Darwin made regarding variation?

Water can cause chemical weathering by which process?

A cell begins to produce a new type of protein. This is most likely due to an alteration of the (1) structure of the cell membrane (2) sequence of bases in a section of a chromosome (3) chemical makeup of the cytoplasm (4) shape of the antibodies

Following the nuclear reactor accidents in Japan in April, 2011, some people were exposed to high levels of radiation. Children born to these people in the future could have mutations if these mutations occurred in the parents' A) sex cells.

When is the carbon stored in plants released? a. during cellular respiration b. during photosynthesis c. when they die d. none of the above

A quick automatic response to something in the environment is called

Organisms best suited to the environment will be the ones that survive and reproduce. This statement best describes A. Natural Selection B. Punctuated Equilibrium C. Adaptive Radiation D. Artificial Selection

External vs Internal environment

According to this food web, which of the following would be considered secondary consumers? Group of answer choices Plants Grasshoppers Wolves Mushrooms

Is a nucleic acid that contains the genetic information for heredity in most organisms. A. a chromosome B. genetics C. a gene D. heredity E. DNA

Joe, a hiker, stands at the top of a hill on a trail above the ocean. Joe's friend Dave is just starting out at the trailhead, which is at the beach. Which statements about Joe and Dave are accurate? Select three options.