This diagram shows types of ecosystems near the Sonoran Desert and Chihuahuan Desert. In which ecosystem would you find the tallest trees?
A. Thornscrub
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B. Grassland
C. Madrean woodland
D. Temperate forest

Describe the primary and secondary immune response in terms of speed and number of antibodies produced?

All but one describes an effect of aging on the digestive system. a) decreased acid secretion b) decreased elasticity of stomach c) capacity to resist damage decreases d) food remains in stomach for less time

Research cheetahs on the internet what has contributed to this animal becoming "endangered" or "threatened." what animal you have chosen? -cheetah how long has the animal been endangered or threatened? what has contributed to this animal’s endangered or threatened status? why is it important to save this animal from extinction? after researching and gathering facts, write a 350-word letter from the point of view of an animal rights' activist. be sure to include at least five facts that you learned from your research.