Need
which of the following are true about the paleozoic era?

i. mammals were common on land and in the oceans.
ii. plants appeared on land for the first time.
iii. seed plants were common by the end of the era.
iv. arachnids and insects appeared for the first time.
a.
iii and iv only
b.
ii, iii, and iv only
c.
i, ii, iii, and iv
d.
ii and iii only

What kind of bond is created by the attraction between atomic particles of opposite charge? ionic bond hydrogen bond covalent bond nuclear bond

The graph shows the amount of global warming happening in different ecosystems. which populations of organisms will likely decline the most as a result of climate change, and why? a.coral reefs because of the loss of the symbiotic algae living within their bodies b.penguin populations because the fish they eat will move into warmer waters c.mountain-dwelling birds because rising sea levels will relocate their food sources d.large cats in the rainforest because of decreased habitat loss for their prey

Moving down the ramp from 6 meters to