Question

molecule that provide directions to make pr ns. most important a & rna
carbohydrate
protein
lipid
nucleic acid
27
multiple choice 2 points
heart rate vs. temperature
according to the graph, what happens to an ectothermic animals heart rate as ambient temperature rises?
it decreases sharply after 20°c.
it remains unchanged.
it increases steadily with temperature.
it oscillates unpredictably.

Explanation:

Looking at the graph titled "Heart Rate vs. Temperature", we can observe the trend of the heart - rate (y - axis) as temperature (x - axis) increases.
For an ectothermic animal, which relies on external heat sources, we analyze the general direction of the curves.
The curves show a positive correlation. As the temperature (on the x - axis) rises from \(0^{\circ}C\) to \(60^{\circ}C\), the heart rate (on the y - axis) values go from lower to higher values.
There is no sharp decrease after \(20^{\circ}C\) (the curves keep rising), the heart rate does not remain unchanged (as the y - values change with x - values), and there is no unpredictable oscillation (the curves have a smooth upward trend).

Answer:

It increases steadily with temperature.