What was the work of Rudolf Virchow trying to prove?

A. All cells came from preexisting cells.

B. Bacteria were unicellular organisms.

C. The theory of spontaneous generation could be supported.

D. Plants had different cells than animals.

Each dna strand in a double helix contains all the information needed to make a new identical double helix.

Some butterflies can ingest toxic chemicals from the milkweed plants they feed on and then canstore those chemicals in their body. Because toxins stored in the butterflies are toxic to birds, thebirds avoid eating the butterflies.

This kingdom contains eukaryotes that all have cell walls of chitin

What one of the following items is a producer of pollution? O A) forest OB) oceans OC) factories OD) bicycles

A mother is nursing her infant. Of the 20 amino acids that exist, 9 would be considered essential for the mother. How many amino acids would be considered essential for her infant?

What structure in the diagram does the fungus use to reproduce sexually? A.) sporangium B.) spores C.) hyphae D.) both A and B

How has fish adapted to its environment to minimized water resistance?

What happens to the energy absorbed during an endothermic reaction.

Which of the following best describes the solar radiation absorbed by and radiated from earth? a. Most incoming solar energy is absorbed by the atmosphere. b. Only a small fraction of energy radiating from Earth is from the atmosphere. c.

What stages do insects have in their life cycle that mammals like people and dogs do not?