Read the passage to answer the question. have you had the chance to watch a tree grow over a span of several years? did you notice that the tree grew thicker and taller? deep in the roots of the tree and high in the growing shoots are meristem cells. each year, the meristem cells the tree continue to grow. question 2 as a tree ages, it needs to keep making more xylem and phloem cells to carry water and food. which statement explains how this occurs?
meristem cells divide and some of the new cells differentiate into xylem and phloem.
xylem and phloem from one part of the plant are transferred to another part.
cell division is not necessary for a plant to create new xylem and phloem cells.
the existing xylem and phloem divide to make more xylem and phloem.

the element that provides strength to the exoskeletons of clams and oysters is phosphorus.

this is so because calcium carbonate is the main component in the shells. calcium carbonate is strengthened by phosphorus.

explanation:

answer: decrease

a limiting factor is the one which decrease the abundance, distribution and causes extinction of the population of species in a ecosystem. here, predators including hawks, owls and snakes are the limiting factor for the population of mexican free tailed bat.   although bats are nocturnal animals as they forge for food at night these predators also may remain active during night which can decrease the population of the mexican free-tailed bats. also, these bats eat only one type of insects that are moths. the food can also be a limiting factor as all 400 members are dependent upon same type of food needs that are moths. the decrease in the moth population can cause decrease in population size of the mexican free-tailed bats.

therefore, the scenarios will most likely to decrease the population size of the mexican free-tailed bats.  

oxygen +1 most likely

the answer would be   10%