Human population growth has led to a reduction
in the populations of predators throughout
natural ecosystems across the united states.
scientists consider the loss of these predators to
have a
(1) positive effect, because an increase in their
prey to maintain stability in the
ecosystem
(2) positive effect, because predators usually
eliminate the species they prey on
(3) negative effect, since predators have always
made up a large portion of our food supply
(4) negative effect, because predators have an
important role in maintaining stable
ecosystems

Calvin ate a candy bar, which caused his body's blood glucose levels to become unbalanced. his body responded by initiating a feedback mechanism to return his body to homeostasis. place the steps of this feedback mechanism in order, starting with the blood glucose imbalance that occurred after calvin consumed the candy bar. a) calvin's blood glucose levels decreased. b) calvin's pancreas stopped secreting insulin. c) calvin's body cells started to take up glucose and store it as glycogen. d) calvin's blood glucose levels increased. e) calvin's pancreas started secreting insulin.

Lola needs to sign 6 invitations. using stopwatch that measures time to tenths of a second, it takes lola 5.3 seconds to sign her full name. going by the accuracy of the stopwatch, which is the most accurate determination for the number of minutes lola needs to sign all 96 invitations

Which kingdom includes some organisms that have no nucleus and can live in an environment with an extremely high salt content