Why are fossils in older rock layers less similar to present-day organisms than in younger layers?

Who was the first person to see cells under the microscope and give them a name?

If b represents the allele for black eyes (dominant) and b represents the allele for orange eyes (recessive), what would be the genotypic ratio of a cross between a heterozygous black-eyed mendalien and an orange-eyed mendalien?

Ventricle a. The semilunar valve separating the aorta from the ventricles. b. The large arterial trunk that carries blood from the heart throughout the body c. The transport through the heart. d.

It's cold outside and you begin to rub your hands together to get yourself warm. Starting with the chemical potential energy stored in your muscles, describe the energy transformations that occur.

What is the plant system is most like the cardiovascular system in animals

Whats a hitchhiking arachnid?

What would mostly likely happen to a unicellular organism if it was exposed to a hypotonic solution for an extended period of time

Scientists use a standardized taxonomic system to separate organisms into hierarchical groups based on similarities and differences in their structural and genetic characteristics Which of the following best explains why a standardized

What happens to atoms after an animal has died?

If an organism has high biological fitness in one environment, does that mean it would also have high biological fitness in another environment? Why or why not