Which is a limitation of a scientific model?
a) models make a system easier to understand.
b) models can be used in almost any situation to explain a system.
c) models are more accurate than observing the real object or system.
d) models are not the "real thing" so it will never correctly represent the system in all respects.

The correct option is D)  Models are not the "real thing" so it will never correctly represent the system in all respects.

Explanation:

Scientific modelling can be described as a representation of the scientific theories or concepts in a way that can be better understood. Scientific models makes it easier to understand what physical, chemical or mechanical activity is taking place. Even mathematical representation comes under scientific modelling.

As models are not the real, hence they cannot be considered to be perfectly accurate. A model can never mark up to the complexity of nature.

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.  

a- multicellular

b-eukaryotic

c-no cell wall

d-heterotrophic

e-autotrophic