Which best explains why mammals became dominant after the mass extinction of the dinosaurs? A) They had traits that helped them adapt to environmental changes.
B
They were larger than dinosaurs and ate different foods.
They lived in different areas on Earth than dinosaurs.
D They were able to hibernate for thousands of years.
PLEASE HELP

Which type of stress results when two plates push against one another? a. compression b. tension c. force d. shear

Which is a characteristic of the electron sea model for metallic bonding? molecular orbitals overlap to produce bands. electrons flow easily between metal nuclei. electrons are in fixed positions in the orbitals. atomic nuclei are arranged in an irregular pattern.

Consider a culture medium on which only gram-positive organisms such as staphylococcus aureus colonies can grow due to an elevated nacl level. a yellow halo surrounds the growth, indicating the bacterium fermented a sugar in the medium, decreasing the ph as a result and changing the color of a ph indicator chemical. this type of medium would be referred to as a differential and enrichment culture.