These are tru or clase questions

1) T or F A flood in a forest could cause trees in that ecosystem to die.

2) T or F Human activities can have a either positive or negative effects on an ecosystem.

3) T or F Short-term environmental changes can affect individuals and populations of organisms.

4) T or F individuals can develop genetic traits that them to adapt to changes in their environment.

answer: 21

step-by-step explanation:

divide 630 by 30. 30 goes into 630 21 times

it creates acid rain

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

i hope this : )