Which is an example of a producer?

A) a duck swimming in a pond

B) a sunflower in a sunny meadow

C) rain falling from a cloudy sky

D) a tiger crouching in the savannah

A pathway by which a chemical element or molecule moves through both biotic and abiotic compartments of an ecosystem.

Which change would most likely eliminate the trait of large, bright spots in male guppies?

Archaeopteryx fossils show that the animal had feathers like a bird. It also had a bony tail, teeth, and claws on its wings like a reptile. Scientists claim this is evidence of a common ancestor. What makes this a sound claim?

What is a water molecule made of? O A. One carbon atom and four hydrogen atoms O B. One hydrogen atom and two oxygen atoms LOR O c. One carbon atom and two oxygen atoms O D. One oxygen atom and two hydrogen atoms

What is mesoderm? Name an invertebrate with mesoderm.

What is the layer underground where all empty spacess are filled with water

What type of epithelial tissue is specialized to stretch repeatedly without damage?

A research team needs an antibody that binds to a protein of interest so that protein expression can be monitored. They use epitope tagging, adding an epitope (a sequence of amino acids) to the protein through DNA recombination.

A physician conducts a survey among 100 patients suffering from migraine headaches severity among his patients. What kind of data analysis would he apply to interpret the results obtained from this survey?

List the general functions of the nervous system