The double layered sac surrounding the heart is the pericardium
I believe it would be The muscular system
Answer:
Brown and withe (mixed)
Explanation:
You can you a allel chart
Other organism would have to compete with the Zebra Mussels and most likely cause a collapse within these different populations
Given: The population density of frogs in a portion of a pond is 12 frogs per square meter. The size of the entire pond is 370 square meters.
To find: The total population size of the frogs in the pond.
Method: Using unitary method of proportions
Solution:
Let p be the density of the frogs present per square meter.
Let A denote the total area of the pond.
∴ p = 12 frogs/m² and A = 370 m²
The total number of frogs in the pond is given by,
Therefore, there are 4440 frogs in the pond.