Ariel drew a diagram to compare two human-induced environmental changes.

Which label belongs in the area marked Y?

A Introduces substances into an environment
B Involves the overhunting of resources
C Causes organisms to use up resources
D Results from the building of roads and bridges

In general, how long does it take to accomplish a long-term goal? a.a few days to a weekb.a few weeks to a monthc.a few months to a yeard. more than a year

Which organisms have pharyngeal arches that develop from all three germ layers and go through the same development stages as embryos? 1.bird 2.ladybug 3.starfish 4.snake

Agene pool: a) is the collection of all the alleles found in a single species b) is the collection of all the alleles found in a single population c) is the collection of all the chromosomes found in a single population d) is the collection of genes in a species that allow the individuals to swim