Leeuwenhoek's microscopes had a resolution (resolving power) of 1 micrometer. this means that

Which of the following is a possible reason for sleep? a) growth b)digestive c)speed d)intelligence

The table shows dates and appearance of index fossils. which rock layers can be dated most precisely? a) a layer containing both a fossil 4 and a fossil 3 b) a layer containing both a fossil 2 and a fossil 3 c) a layer containing both a fossil 1 and a fossil 4 d) a layer containing both a fossil 1 and a fossil 2

Acceleration is a direct result of a.) balanced forces b.) unbalanced forces c.) gravity d.) velocity