Answer:
Both prokaryotic and eukaryotic cells have a plasma membrane, a double layer of lipids that separates the cell interior from the outside environment.
Explanation:
The correct answer is: oxygen and nutrients.
Ocean abiotic factors are non-living factors that influence an ocean ecosystem.
Nutrients are substances that ocean organism obtains from their environment in order to grow and live such as nitrogen, phosphorus, sulfur, carbon, iron, potassium, magnesium.
Oxygen is a necessary element required for respiration (most ocean organisms are aerobic), metabolism and other chemical reactions within the organism. Oxygen in the ocean is produced by algae and phytoplankton via photosynthesis.
Artificial selection is the breeding of the best species by humans. For example, the fastest horse or something like that. This means breeding with species with the traits that produce offspring with the desired traits. To do this variation is needed. Not all species are going to have the desired traits but not all are going to have the undesired traits. However, if there is no variation, all animals of the same species are either going to have the unwanted traits or the desired traits. Now, if they all have the traits that us, humans, don't want, then such a concept and process like artificial selection would not exist.
Answer:
it's equal to mass of CaO plus the mass of CO2 by law of conservation.