Match each description with the pictures shown above.

Sediment A:

Sediment B:

Explanation:

Sediment A: In the figure shown on left, the particle size is small and corners are round. This suggests that it is most likely made up of carbonate which can dissolve easily in the presence of water and CO2 forming weak acid (carbonic acid). Likewise, it is also possible that the material has traveled longer distances and due to erosion, the corners of the particle has become rounded. The carbonaceous material in the sea environment is often made by carbonate producer organisms that use calcite to make the protective shell.

Sediment A: In the figure shown on right, the material is bigger in size with hard and sharp corners. This means that it is either broken recently from the rock and has not traveled longer distances OR, it is made up of harder minerals that cannot break easily by weathering and erosion process. Quartz sand has such properties.

answer: - few nutrients

high pressure

low temperatures

explanation: 1. few nutrients:   open-ocean zone is located way far from the land, which is the main source of the essential nutrients.2. high pressure: pressure increases by 1 atmosphere for every 10 meters increase in depth.3. ample sunlight: a large fraction of the sunlight is reflected back to the atmosphere from the sea surface. 4. varying salinity: below the thermocline, the water is isolated from the atmosphere so the salinity remains stable over the year.5. low temperatures:   the temperature of open-ocean zone ranges from a low of -2°c to an average of 17°c

interphase   is the cell cycle stage in which the cell acquires nutrients, creates and uses proteins and other molecules and starts the process of cell division by replicating the dna. it is the longest stage in the eukaryote cell cycle.

the following   can go wrong during interphase:   a base pair could be mismatched during the duplication process causing a mutation.   correct answer: c

explanation: