Francium has 36 isotopes, but only francium-223 occurs in nature. Francium-223 spontaneously emits particles and energy, so francium-223 is a (an) of francium.

Describe how the movements of Earth might expose a fossil.

What determines the sequence of sugar addition to glycoproteins traveling through the Golgi complex? A) Nothing - the sequence is random.

Inadequate thyroid hormone is known as: a. hypo. b. hyper.

Yeast cells that have defective mitochondria incapable of respiration will be able to grow by catabolizing which of the following carbon sources for energy?

What is a reproductive strategy? A. The way that a species creates offspring B. The way that an organism hunts for food C. The number of alleles an organism passes on D. The DNA that is passed onto an offspring

Uit flies are commonly used in genetic investigations that focus on traits passed from parents to offspring over several generations. What can you infer is the reason fruit flies are the most commonly used organism for this type of investigation?

5 potential causes of Microevolution

Delia is interested in finding ways to cure diseases. Which of the following career fields would best suit Delia's interest? animal biology cytology nuclear biology zoology

The purpose of a mordant in the Gram stain is to: make gram-negative cells visible. prevent the crystal violet from leaving the cells. make the flagella visible. make the bacterial cells larger. remove the simple stain.

Nicolas Steno (1638-1686) recognized that fossilized shark teeth were formed from actual prehistoric shark teeth.