Which of the following events happened first?

-First mammals appeared

-Pangaea broke apart

-Dinosaurs became extinct

-First angiosperms appeared

In 1961, two neurosurgeons were able to reduce seizure activity in epileptic patients by severing the corpus callosum. the neurosurgeons were:

Which is not true about carbohydrates? a. their monomer is a simple sugar. b. they contain carbon, hydrogen and oxygen. c. they typically contain hydroxyl groups. d. they include glycogen and cellulose. e. they have mostly ionic bonds?

What do we mean by geocentric model of the universe?

What would be accomplished if crossing over occurred between sister chromatids? explain

Catherine is working on a study of different groups of animals. In which group of animals would she find the most diversity?

If a diet does not provide adequate carbohydrate to meet immediate energy needs, the body compensates by altering its metabolism of other nutrients. insufficient dietary carbohydrate can lead to elevated levels of ketone bodies.

If an enzyme-mediated reaction were carried out at a temperature that was higher or lower than optimal, the vmax for the reaction would probably be

Which of the following is not a mechanism of microevolution? Group of answer choices migration (gene flow) natural selection speciation genetic drift

What weather factor is also a measurement of energy held within the air? Humidity Pressure Temperature Wind

What is the probability that, in an organism with a haploid number of 12, a sperm will be formed that contains all 12 chromosomes whose centromeres were derived from maternal homologs?