Scientists believe that the first life forms to appear on planet earth were probably similar to which modern organisms?
a) viruses
b) bacteria
c) plant cells
d) animal cells

The correct answer is -

B) bacteria.

Explanation:

The first life form on Earth is considered to be a microbe with single-cell, lacking a nucleus and membrane bound subcellular compartments, known as prokaryotes (bacteria).

They seemed to have first appeared around four billion years back, just a few hundred million years after which Earth formed itself.

Thus, scientists believed that the first life forms to appear on planet Earth were similar to bacteria.

rocks and weathering-matching

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.