Answer:
I'm guessing proteins because hair is made out of keratin and keratin is a protein.
Explanation:
Many rickettsia are PATHOGENS.
Pathogens are micro organism that cause diseases and rickettsia are majorly disease causing organisms. They are rod shaped bacteria and most species are gram negative. They are natural parasite of some arthropods and they cause diseases in both humans and animals.
Answer: Their diet consists of small shrimp and crustaceans, including larvae. As they grow older, they graduate to fish, crabs, and other mollusks.
Explanation:
Plants showing hydrotropism grow in response to water.