2
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18.
nanged
a scientist conducted a study of an organism
and found that its body cells contained
40 chromosomes. these cells were cultured in the
laboratory, and cell division was observed. what
difference, if any, would the scientist expect to
observe between body cell division and sex cell
division in the organism?
on?
ts
a. body cells divide by mitosis, and sex cells
divide by meiosis.
b. body cells divide by meiosis, and sex cells
divide by mitosis.
from
there is no difference; body cells and sex
cells both divide by mitosis.
d. there is no difference; body cells and sex
cells both divide by meiosis.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.

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.  

igneous rocks which formed by the crystallization of magma at the surface of the earth called extrusive rocks. they are characterized by fine-grained textures because the rapid cooling at or near the surface did not provide enough time for large crystals to grow.

if you add everything up correctly you should get 69 i got this because 50 plus 19 is it