Which is not a factor in a fossil organism being useful as an index fossil?

Clarice presses the Ctrl and S keys on her keyboard to save a document. A file then created on hher computer's hard drive. Clarice's action is most analogous to the memory activity of:

What compound do chocolate, coffee, and caffeine contain that is toxic to pets? ansc?

What made niches available for the radiation of: amphibians

How did the evolution of organelles benefit organisms

Lethal genes (genes that result in the failure to develop a vital organ or metabolic pathway) are nearly always recessive.

Difference between natural selection and evolution

Which two atoms form covalent bond?

Select the characteristics common to both green algae and plants. (probably more than one answer) food is stored as starch leaves conduct photosynthesis roots absorb extra nutrients cell walls are made of cellulose

Which of the following membrane activities require energy from ATP hydrolysis? A) facilitated diffusion. B) movement of water into a cell. C) Na + ions moving out of the cell. D) movement of glucose molecules. E) movement of water into a paramecium.

Which of these was the dominant plant group at the time that dinosaurs were the dominant animals? a. bryophytes b. charophyceans c. angiosperms d. gymnosperms e. seedless vascular plants