The oldest known fossils of multicellular organisms were found in 700-million-year-old rocks. Which of the following processes led to the evolution of multicellular organisms?

How does La Niña affect the climate of the Pacific Ocean? A. It cools the water to below its normal temperature. B. It increases hurricane activity. C. It warms the water to above its normal temperature. D. It moves warm water toward the east.

A rabbit is eating leafy plants on a sunny day. What is happening to the carbon in the plants and in the rabbit? a Carbon is only moving out of the living things; it is not moving into them. b With this information, there is no way to know for sure.

Describe the current beliefs as to why people age

In Death Valley, California, there are several ponds that are formed in various areas of the desert. Each pond contains its own species of fish unique to the pond it lives in. a. geographic isolation b. anatomical isolation c. behavioral isolation d.

Why does the aquarium trade contribute to the introduction of nonnative species? a. Exotic species can escape or be released into local ecosystems. b. Aquarium owners do not always understand how ecosystems interact. c.

Why is DDT so hazardous? A:it does not decompose fast B:it killed almost everything C: it traveled to many continents through water

What is kind of cell does the plants has

Which structures are found in fungi? Check all that apply. cell walls hyphae cilia leaves nuclei spores

Patsy has always been "larger than life." She tends to blow even small annoyances out of proportion. For example, when the store didn't have the dress she wanted for prom, it was the "end of the world.

What is the advantage of having a folded membrane surrounding the cell, within the cytoplasm, or within an organelle?