Why are chromosomes duplicated

When you look at your teeth in a mirror, what part do you see? A. cementum B. root C. dentin D. enamel

What role does a transcription factor play in a signal transduction pathway and why?

In humans if a trait is passed on the X chromosome then the trait is a) sex-linked b) autosomal c) recessive d) polygenic

In addition to providing yogurt with its unique flavor and texture, lactic acid-producing bacteria also provide which additional benefit during food production? a. Providing xenobiotics b. Lowering the pH to kill pathogenic bacteria c.

In what part of a mitochondrion does the krebs cycle occur

Aquatic plants do not contain a) chloroplasts b) cells c) lignin d) nuclei e) chlorophyll

Jennifer's baby brother had infantile Tay-Sachs disease (TSD), but Jennifer did not have the disease. When Jennifer grew up and got married, her third child also had infantile TSD. How is this possible? A.

Which molecule do mammals use to store extra glucose? a. glycogen b. cellulose c. starch d. myosin

Which of these processes describes the effect Earth's atmosphere has on Earth's hydrosphere? A: River overflowing and flooding farmland B: Glaciers melting and increasing the ocean water levels C: Warm, moist air increasing ocean temperatures D:

Which two organelles are found in plant cells but not animal cells