What is denser, salt water or cold water? Why?

Euglena are not the only organisms that have flagellum. Zooflagellates are protozoa that also have flagella. Although euglena and zooflagellates move by flagella, why are these organisms classified differently?

In which of the following ways is DNA replication different from DNA transcription? New cells can only be created after transcription has taken place. Replication results in mRNA strands while transcription creates new DNA.

The dark reaction of photosynthesis is also called the

What is the largest natural population of organisms that can interbreed to produce fertile offspring?

What makes embryonic stem cells useful for medicine A : They are already differentiated into organ cells B : they can differentiate into more cells than adult stem cells can C;

Why is dna replication important to the growth and development of a multicellular organism

The idea of organism changing over time to form new organism led to the theory of

Prokaryotic cells are distinguishable from eukaryotic cells because prokaryotes do not contain:

You and your colleagues are constructing a pedigree for a boy with cystic fibrosis. The individual's younger brother has also been diagnosed with cystic fibrosis.

Marine iguanas are found only on the Galapagos Islands. Which biodiversity pattern does this Which of the following statements correctly define evolution? A. Evolution is the rate at which an individual organism changes. B.