a biologist studying a desert ecosystem observes that the population of a lizard species increases following a particularly hot, dry period that causes a snake species to decline. what could the biologists hypothesize about the roles of theses two species? a: the lizard preys on the snake b: the lizard is a parasite of the snake c: the snake and the lizard use the same limiting recourse d: the snake is a keystone species in the ecosystem me its for a huge test and i need the answer!

Select all the correct answers. lactobacillus is a bacteria that live inside humans. these bacteria live on the nutrients from our bodies. they to keep our gut clean and healthy. s. typhi is a bacteria that enter our bodies through contaminated food. this bacteria causes infections in the body. based on this information, which two statements about the association between these bacteria and humans are true? a. lactobacillus shares a parasitic relationship with humans. b. s .typhi shares a parasitic relationship with humans. c. both lactobacillus and s. typhi share a parasitic relationship with humans. d. both lactobacillus and s. typhi share a mutualistic relationship with humans. e. lactobacillus shares a mutualistic relationship with humans, and s. typhi shares a parasitic relationship multiply chrse

With the word calcite wich completes the analogy mineral, erosion, marble, or aragonite

What makes a dominant allele different from a recessive allele