Which of the following statements BEST describes a parasite? * A) An organism that lives inside another organism
B) An organism that lives in or on a host, harming the host to help itself
C) An insect that eats another organism
D) A worm that turns other creatures into zombie

she forgot to record a transaction

is this for the e2020 class

in 1859, charles darwin set out his theory of evolution by natural selection as an explanation for adaptation and speciation. he defined natural selection as the "principle by which each slight variation [of a trait], if useful, is preserved".

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.