The findings of Pasteur and others have established that
A) living organisms regularly self-assemble (arise spontaneously) from nonliving matter.
B) living organisms do not arise from nonliving matter today, nor did they arise from nonlife in the past.
C) advanced organisms cannot arise from nonliving matter, but simple microbial life often does arise from nonlife today.
D) life does not arise from nonliving matter today, but in the conditions of early Earth, such an event could have occurred.
Answer: D
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Skin is sometimes referred to as the largest organ of the body. Why is skin considered to be an organ and not a tissue or some other structure?
A. Skin consists of multiple cell types functioning as a single integrated unit. B. Skin consists of a single cell type. C. Skin is a vital component of multiple organ systems. D. Skin consists of multiple tissue types that cooperate to perform a specific task.
The carbon dioxide that we breathe out is a breakdown product of cellular respiration; the
carbon atoms come primarily from which molecules?
a. glucose b. proteins c. oxygen d. water
Multicelled, absorptive structures called __________ are on each fold of the small intestines Fill in the blank(s) with the appropriate word(s)
In this figure, the genotype of the resistant parental bollworms is ___ while the susceptible parental bollworms have a ___ genotype
a. RR; Rr b. Rr; rr c. RR; rr d. Rr; RR e. rr; RR