What happens at a spring tide?
A There is only one high tide each day.
B There is only one low tide each day.
C There is the most difference between
consecutive high and low tides.
D There is the least difference between
consecutive high and low tides.

Apea plant that is heterozygous for the tall phenotype can produce short offspring when self pollinating. which of the following explains why this occurs? a. segregation of allels b. condominance of traits c. polygenic expression of traits d. independent assortment of alleles

The circles, or orbits, for electrons are called energy levels. each level can hold only a certain number of electrons. add electrons to each level until you can't add any more. how many electrons can each level hold?

Is there any species that went extinct in recent years due to natural causes (not caused by human interaction). if so, what caused it?