select the correct answer.

what was anton van leeuwenhoek’s contribution in the development of cell theory?

a.

he built the first compound microscope.

b.

he was the first to observe live cells in a sample of pond water.

c.

he concluded that cells exist in liquids.

d.

he stated that all living things are made of cells.

Which of the following statements is most likely correct about a rock belonging to the jurassic age and a rock belonging to the cambrian age? options: 1) they have identical fossils of organisms that have evolved over time. 2) both have animal fossils preserved in them due to weathering and erosion. 3) they contain different fossils because life on earth has changed through time. 4) the fossils in them were formed on the surface of earth due to exposure to sunlight.

Across of blue x blue (both heterozygous) would result in

In guinea pigs, black fur (b) is dominant over white fur (b). cross a heterozygous (hybrid) black guinea pig with a homozygous (purebred) white guinea pig. complete a punnett square, identify the genotype(s), phenotype(s), and probability (% and fraction) that the offspring will be black and white?