To what does “descent with modification” refer? a. All species come from preexisting species but stay basically the same.
b. Some species come from preexisting species and are changed over time.
c. All species come from preexisting species and are changed over time.
d. Some species come from preexisting species but stay basically the same.

I ALREADY KNOW ITS NOT D BUT MY TEST SAID THAT WAS NOT RIGHT AND I ONLY HAVE ONE MORE CHANCE PLEASE HELP

What does it mean for an allele to be dominant?

When does a spring tide occur? question 9 options: they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur twice a year in the spring and fall. they occur on the date of the vernal equinox each year, no matter what stage the moon is in. this is why they are called spring tides. they occur when the sun, moon, and earth are at 45-degree angles from each other. this happens once every spring. they occur when the sun, moon, and earth are aligned. in spite of their name, these tides occur all year long.

In a leaf, dermal tissue a) stores food b) stores carbon dioxide c) releases oxygen into the air d) transports water from the roots