The highest tides occur when: sun and moon are aligned on the same side of the earth any time the sun, moon, and earth are aligned sun, moon, and earth are at right angles

What causes darkening of the skin as melanin production increases

How do you know that the plant cells in these two images have different jobs, or functions? a. because all plant cells serve different functions b. because they are two different colors c. because their dna are different d. because their structures are different

According to theories of how life began, how did early organic molecules begin to separate from the outside world? a: specialized enzymes were required b: chains of amino acids created a barrier c: formation of microspheres or vesicles d: rna catalyzed the formation of membranes