What three features serve to distinguish vascular plants from nonvascular plants?
What will be an ideal response?
Dominant sporophyte generation, specialized conducting tissue, and specialized body form.
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Refer to the paragraph on the Krings et al. paper. Why did the researchers wear protective clothing and note so emphatically that they did so?
A) They needed to be certain there were no ancient pathogens on the sample that modern humans hadn't been exposed to. B) They needed to be sure not to harm the precious sample with oils from skin or moisture from their breath. C) They needed to minimize the chance of introducing their own mitochondrial DNA to the sample. D) They needed to follow careful, standardized laboratory procedures required by law and document their compliance.
Ribosome inactivating proteins (RIPs), such as the poisin ricin, are deadly because they inactivate ribosomes. How does ribosome inactivation lead to death?
What will be an ideal response?
In considering a pyramid of biomass, explain why a large producer biomass is needed to support a population of
carnivores. What will be an ideal response?
African sleeping sickness is caused by which pathogen?
A) Giardia lamblia B) Plasmodium falciparum C) Toxoplasma gondii D) Trypanosoma bruceii