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Darwin proposed the theory of natural selection. For the most part, natural selection acts as a filtering agent at the ____________ level of life’s hierarchy.

Voy a correr en el parque. Necesito ____________

¿De qué color son las bananas?

Steroids such as testosterone and estrogen belong to which class of biological molecule?

Nosotros __________________ compramos unos zapatos ( a ustedes) 

Forensic psychologists are trained as

Human beings and other animals must eat food to meet their daily energy needs. This example demonstrates which property of life?

Which polysaccharide, which humans cannot digest, is found in the cell walls of plants?

Which of the following is necessary for natural selection to occur?

Which of the following best describes a prokaryote?