What is the best description of organisms of the Precambrian era?

A. land plants and animals

B. Dinosaurs and primates pice mammals

C. Single celled organisms and soft, boneless animals

D. Ferns and flying reptiles

Both insulin and glucagon are peptide hormones that target liver cells. The response of the target cells to each of these two hormones is opposite. This information implies that

Which food nutrient is responsible for growth and repair

What sphere do we find fossil fuels in?

How has science led to advancements that benefit society? a. Science increases the understanding of natural processes, which leads to technological advances. b. Scientific exploration has led to a social imbalance. c.

The upper forelimbs of humans and bats have fairly similar skeletal structures, whereas the corresponding bones in whales have very different shapes and proportions.

Which of these modes of transmission require a bodily opening either natural or artificial?

Which factor is a characteristic of an acid? A. Non-corrosive B. Soapy C. Sour D. Slippery

How are unique daughter cells created in meiosis? A. Homologous pairing B. Crossing over C. Mutation during reduction Division D. Zygote fertilization

In any food web, which organism has the LEAST available energy? A) birds or omnivores B) plants or producers C) fungi or decomposers D) animals or carnivores

What organelle stores DNA in eurkaryotic cells?