When a lake freezes, how does the density of water prevent all of the living organisms in the lake from freezing as well?

What happens when wine is contaminated by aerobic bacteria?

A cell is viewed under a microscope and is found to have two nuclear envelopes and spindles that appear to be breaking apart. Which phase is the cell most likely in? A) metaphase B) telophase C) prophase D) anaphase

Which statement is evidence used to support the endosymbiotic theory? Mitochondria and chloroplasts contain their own DNA. Mitochondria and chloroplasts are surrounded by one membrane.

Above is an example of a food chain or pyramid. Ultimately, either directly or indirectly all organisms on this food chain get their energy from what single source?

Which organelle is used for carrying out photosynthesis?

What can be inferred from the phylogenetic tree shown? A) Flagellates and Animals are more closely related than Fungi and Animals. B) Ciliates and Diplomads are more closely related than Plants and Ciliates.

The food web in a diverse ecosystem is

How many ATP equivalents are made from convention of succinyl-CoA to oxaloacetate? Assume that re-oxidation of NADH via the electron transport chain yields the equivalent of 3 ATP, and that re-oxidation of FADH2 yields 2 ATP.

A situation where friction is desirable.

You discover an organism that has scaly skin and is aquatic but returns to the land to reproduce. what else would you expect to find in this organism?