A population of beetles is kept in a controlled ecosystem. No beetles are allowed to enter or leave. The graph below shows the population of beetles.
Beetle Population
с
Population size
"B
В
A
Time
Which best describes the ecosystem at Point A?
ye
O
A. The death rate is higher than the birthrate.
о
B. Population growth is slowing down.
O
C. There are plenty of resources.
D. It has reached carrying capacity.

C

Explanation:

It is not A, A would see a decline or downward arrow in the population

It is not B, B would see the upward trend becoming longer horizontally / becoming slower

It is not D, D would be the red dashed line

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a. suckling by young

b. hypothalamus

c. dopamine

d. trh

e. anterior pituitary

f. mammary glands

g. milk production