How does an allele cause a trait in an organism?
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a. the allele is a code to form a type of gene.
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b. the allele is used during transcription to make dna.
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c. the allele is used by proteins to create chromosomes.
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d. the allele causes a certain type of protein to form.

Look at the following answer choices and determine which belongs in the both category. testable, can be disproven explains natural phenomena, has evidence to support it prediction, tentative, one or more scientists working together well established, many different scientists working independently, highly reliable

Which of the following statements about archaea and bacteria is true? a. neither is single-celled. b. they both have nuclear membranes. c. neither reproduces by binary fission. d. they both lack a nuclear membrane.

Describe the function of the endomembrane system? what organelles are involved?