If we look in a microscope how do we know something is a cell

Characterization of the complete three-dimensional structure of a newly purified protein suggests that it catalyzes the breakdown of a large substrate. The protein consists of a single polypeptide chain.

Ln mammalian cells, the synthesis of fatty acids is catalyzed by a multifunctional protein named: a) Acetyl CoA Carboxylase b) Carnitine acyltransferase c) Fatty acid synthase d) B-ketoacyl synthetase e) Acyl carrier protein

Can more than one dichotomous key be developed to identify the same group of organisms? Explain. To answer this question, refer to this lesson's dichotomous key for birds.

According to your text, Astrobiology, A Very Short Introduction, there were two major hurdles to the formation of advanced life on Earth. The development of complex specialized cells, and the generation of an oxygen rich atmosphere.

An example of thermal energy is?: A) glucose. B) noise from a jet engine. C) heat from your furnace vent. D) a sweater. I think the answer is C but I'm not sure!

Ground squirrels are found in many areas of the United States. They live in underground burrows and are often attacked by birds of prey, coyotes, and boBCats. Which of the following is a limiting factor for a ground squirrel population?

10. Which of the following is an emerging dis- ease that was unknown 50 years ago? a. malaria b. dengue fever C. Lyme disease d. schistosomiasis

You eat a large meal and then hike up a hill. What kind of energy transformation is your body performing? A. Chemical energy to kinetic energy and nuclear energy B. Potential energy to sound energy and nuclear energy C.

Which nervous systems balance each other to provide homeostasis?

The modern classification system is based on A - putting organisms into categories based on where they live. B - putting organisms into categories based on how they reproduce. C - putting organisms into categories based on similar characteristics.