Day and night are caused by A. the rotation of the Sun on its axis. B. the Sun completing a full orbit around the Earth. C. the Earth completing a full orbit around the Sun. D. the rotation of Earth on its axis.

A scientist is examining a fossilized insect that may be an ancestor of modern dragonflies. Which of the following should the scientist compare to best determine how closely related the fossilized insect is to modern dragonflies?

What changes can be produced by force

What do enzymes do within cells?

How does muscle act onbone to cause movement

Runners who drink too much water before a marathon run a risk of water intoxication, also known as

Two of the risk factors for Down's syndrome include which of the following? Options exposure to high temperatures increased age of female infectious hepatitis over exposure to sunlight

What is the main difference between the life cycles of members of phylum bryophyta and phylum pteridophyta?

Unfinished proteins transported from the er are modified in the cell's

What would be the most likely explanation pf increased Earth tides?

A human gene has 5 alleles. how many heterozygous genotypes are possible? 5 correct answer 10 15 20 25