How much of the earth's oxygen is generated by marine organisms?

How do the geography and geographical features of your area affect the weather in the area?

If two atoms are isotopes of the same element, what will they have the same number of? What will they have a different number of?

The population size of California sea lions was reduced to about a dozen in the early 20thcentury, primarily due to overhunting. The population size has since rebounded, and there are now thousands of sea lions.

The simplicity of prokaryotic cells prevents them from a) growing and reproducing b) responding to their environment c) forming specialised tissues and organs d) moving through their environment

If a male with klinefelter syndrome undergoes spermatogenesis (without nondisjunction), how many chromosomes would be present in the sperm? select all that apply.

Which of the following do fish NOT use to breathe? A. air bladder B. pharyngeal slits C. pores on their back D. olfactory bulbs

Imagine a protein that has been engineered to contain a nuclear localization signal, a nuclear export signal, a C-terminal peroxisomal targeting sequence, and a canonical endoplasmic reticulum (ER) signal sequence.

Which organelle receives protein from endoplasmic reticulum and sorts and packages it for delivery outside cell?

Eukaryotic cells have many different specialized structures that are involved in making, organizing, and delivering a protein molecule. Describe the four organelles that are involved and the sequence of events of this process.

What do scientists call an orderly pattern of change over time? A. homeostasis B. ecological succession C. food web D. an ecosystem