Evolution and the Tree of Life

What is the best way to visualize evolutionary relationships?

• A ladder in one direction

• A series of steps

• A web

• A tree

What is the main difference between prokaryotes and eukaryotes?

• Prokaryotes have specialized transport cells, eukaryotes don't

• Eukaryotes have genetic material contained within a nucleus, prokaryotes don't

• Prokaryotes are autotrophs, eukaryotes are heterotrophs

• Prokaryotes are multicellular, eukaryotes are single-celled

What is the defining characteristic of plants?

• They have radial symmetry

• They are heterotrophs

• They can make their own food by photosynthesis

• They have rigid walls made from chitin

What is the main role of fungi in the ecosystem?

• To provide food for animals

• To release nutrients back into the soil for plants to use

• To produce oxygen through photosynthesis

• To help in the process of pollination

What is the defining characteristic of animals?

• They have membranes that allow for things to move in and out of cells

• They have radial symmetry

• They can make their own food by photosynthesis

• They are autotrophs

What is the estimated percentage of Earth's biomass that is made up of plants?

• 80%

• 2%

• 14%

• Less than 1%

What is the primary function of photosynthesis in plants?

• To produce oxygen

• To produce carbon dioxide

• To produce glucose

• To produce nitrogen

What is the main role of bacteria in the ecosystem?

• To provide food for animals

• To help in the process of pollination

• To decompose organic matter and recycle nutrients

• To produce oxygen through photosynthesis

What is the defining characteristic of fungi?

• They can make their own food by photosynthesis

• They have rigid walls made from cellulose

• They are heterotrophs and have cell walls made from chitin

• They have radial symmetry

What is the primary function of respiration in animals?

• To produce oxygen

• To produce carbon dioxide

• To produce glucose

• To produce energy