Which of the following is not true about darwin’s book on the origin of species?
a. he worked on the manuscript for three years.
b. it was successful.
c. it explained his theory of evolution.
d. it was based on his findings in south africa.

In which case would a scientist choose to use a dissecting microscope rather than a compound microscope

The earth consists of a variety of different organisms. despite their diversity, however, some similarities on the structural and metabolic levels may be seen. these similarities can be attributed to a. similarities among organisms in their proteins and nucleic acids. b. the ability of organisms to readily adapt to sudden environmental changes. c. similarities in organisms' habitats and niches. d. the ability of all organisms to interbreed and produce new species.

Which best describes the digestive system of arthropods? a incomplete, two openings b complete, one opening c two-way, one opening d one-way, two openings