Ecosystems need producers because they are the start of the food chain.
Producers are consumed by first consumers, the second consumers and so on.
Answer:
The structure of their noses.
Explanation:
Catarrhines are distinguished from platyrrhines by several traits but the main distinctive feature between them, is the structure of their noses. This forms the basis of their names.
Platyrrhines are characterized by laterally-placed, rounded nostrils or flat-nosed while catarrhines have narrow, downward-facing nostrils or hooked-nosed.
Another distinguishing feature include their dental formulation which is 2.1.2.3 in catarrhines and 2.1.3.3 in platyrrhines.
The skull structure of catarrhines have frontal bone which make contact with the sphenoid bone unlike the platyrrhines.
Generally, catarrhines are much bigger in size than platyrrhines.
<span>Answer : D. The factor
that's changed by the experimenter and impacts the dependent variable.<span>
</span><span>An
independent variable is a variable in which you can manipulate or control while
the dependent variable depends on the independent variable. An
example of an independent variable is the running while the dependent variable
is your pulse rate. The pulse rate depends on how fast and how long is the
distance of your run. The pulse rate maybe higher and faster if you’ve run quite
long and will be close to stable if you only run for a short distance and slow
speed.</span></span>
I believe it’s B. Dont take my word for it
