Which of these was NOT characteristic of the first cells on Earth?

A)

anaerobic

B)

prokaryotic

C)

single-celled

D)

contained organelles

How are bacteria different from viruses? (a) Bacteria can cause diseases. (b) Bacteria posses cell structures such as cell walls, flagella and ribosomes. (c) Bacteria are very small in comparison to a virus.

Two different trees have been classified as Pinus pinea and Pinus nigra. Which of the following statements is correct? A. Both trees belong to the same class but a different genus. B. Both trees belong to the same family and same genus. C.

Which molecules are able to pass through the semi-permeable membrane

Which of Earth's spheres includes mammals, fishes, and birds?

Which option correctly describes how Earth's temperature has changed during its history?

Which statement best describes the relationship between activation energy and rate of reaction? O Increasing the activation energy can increase the rate of a reaction. O Reducing the activation energy can increase the rate of a reaction.

Definition: this is a haploid cell with half the reproductive information from the parent.

Does a cell use energy when molecules diffuse in or out of the cell? Why?

Below is a list of possible challenges. Check all errors that you mentioned in your answer. Traits other than beak type might affect natural selection. It could take many generations to observe adaptions to a population.

A farmer dug a well but did not find any water Which reasons most likely explain why the farmer did not find water? Check all that apply.