a photomicrograph of onion root tip cells during mitosis is shown below. which phase of mitosis is occurring in the cell indicated by the arrow?

What type of lipids are found in all biological membranes?

Indicate whether the following statements about the biases in the fossil record are true or false. a) inland species are more likely to be preserved than marine species b) organisms with hard body parts are more likely to be preserved than are those composed soft tissues. c) species that existed over a larger area are more likely to be preserved than species existing over a smaller area. d) organisms that lived very long ago are more likely to be found as fossils than organisms that lived relatively recently e) the fossils of larger organisms are more likely to be found than the fossils of smaller organisms

How can you approximate the number of calories required to keep you in energy balance?