Natural selection acts on a population to produce individual organisms with different adaptations. Which is true about these adaptations? A)These adaptations are designed so every organism will be perfectly adapted to its environment B)The usefulness of these adaptations is tested by interactions in the surrounding environment. C)These adaptations are useful to every organism and their descendants in the any environment D)The usefulness of these adaptations is reduced by interactions in the surrounding environment

Robert wants to know which fertilizer will work the best for his grass. what can he do to explore this inquiry?

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

Which number represents a basic ph, 4 or 9? numerical answers expected! answer for blank 1: i'll give