Scientists have determined that this crater was created by a(n) ____. 
Definitions:
Fertility
The natural capability to produce offspring.
Childbirth
The process of delivering a baby and placenta from the uterus to the outside world.
Lactation
The biological process by which mammals produce milk to feed their offspring, involving hormonal regulation and mammary gland development.
Gas Neurotransmitters
Small, gaseous molecules that serve as neurotransmitters in the nervous system, capable of diffusing across cellular membranes to send neural signals.
Q15: What is one result of the bottleneck
Q18: Horseshoe crabs have lived in the earth's
Q30: In the 16th century, a Spanish ship
Q34: Our closest extinct relative is _.<br>A) Homo
Q35: Red algae _.<br>A) are primarily marine organisms<br>B)
Q37: Genetic recombination as a result of crossing
Q40: A cell cycle checkpoint at which phase
Q51: How are fossils older than 60,000 years
Q55: An allele is _ if its effect
Q68: Both mitochondria and chloroplasts are thought to