Which of the following most likely coincides with mass extinction in the geologic time scale?
A: rapid global changes to the environment
B: long periods of environmental stability
C: the introduction of native species to a new environment
D: the removal of nonnative resources from an environment

I’m stuck on this question cuz i’m stupid sksksksk

Any sound above what db can cause hearing loss in human beings

Parthenogenesis is a type of reproduction that does not require a mate. it’s rarely seen in birds and higher vertebrates. parthenogenesis involves the formation of a zygote. but this zygote is formed without fertilization. in parthenogenesis, in the absence of a male gamete, the ovum develops directly in the zygote.