Answer: 1. Sea urchins and sea otters
2. They are prey for carnivores.
3. Sea otters, star fish
Explanation:
Sea urchins and sea otters are carnivores as they eat on the flesh of starfish and sea urchins respectively.
Starfish feed on the kelp forests which are the producers in the food chain and the starfish is the primary consumer and prey for sea urchins. So, starfish and kelp forests are the prey in the marine ecosystem.
Keystone species is the one which controls the population of other inferior species in an ecosystem. Here, sea otters consume sea urchins so the population of sea urchins remained in control Starfish controls the population of kelp forest.
Choice two and five are correct!
Answer: cell
Whole body respiration reflects the process of cellular respiration that takes place in the cell.
Explanation:
Cellular respiration is defined as the oxidation of organic food substances within the cell leading to the release of energy, carbon dioxide and water.
It can be represented by the equation:
C6H12O6 + 6O2 --> 6H2O + 6CO2 + Energy (in form of ATP)
Thus, the main purpose of cellular respiration that takes place in a cell is to generate energy required by the whole body.
Cell wall and cell membrane are both in plants and animal cells in fact in all cells because they are the protective layer for outsiders