I use save my exams
https://www.savemyexams.co.uk/gcse-biology-aqa-new/
And I also use past AQA papers but end of topic tests
Hope it helps :)
High carbon dioxide concentrations make it difficult for marine animals to breathe (to extract oxygen from seawater). This makes it more difficult for these animals to find food, avoid predators, and reproduce. Low oxygen concentrations can have similar effects.
<h3>What is the importance of oxygen for marine animals?</h3>
It is necessary for fish and other aquatic organisms to survive. Because of the aerating action of the wind, oxygen dissolves in surface water.
As a byproduct of aquatic plant photosynthesis, oxygen is also introduced into the water. Fish and other aquatic organisms cannot survive when dissolved oxygen levels fall too low.
High carbon dioxide concentrations make it difficult for marine animals to breathe (to extract oxygen from seawater).
This makes it more difficult for these animals to find food, avoid predators, and reproduce. Low oxygen concentrations can have similar effects.
Thus, these are the effect of high carbon level have the deep ocean.
For more details regarding dissolved oxygen, visit:
brainly.com/question/26113345
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Answer:
b. the bond between the phosphate groups is broken to release energy
Explanation:
- Phosphate groups are negatively charged => there is a pull between the two groups
=> it's easy to break this bond & ATP is unstable
=> ATP has a lot of free energy
- breaking the bond between phosphate groups makes the molecules more stable (aka contains less free energy)
=> delta G <0
=> breaking this bond releases energy
- the energy released by ATP is then used to transport large molecules against the concentration gradient
Answer:
The correct answer is -A. producer level.
Explanation:
the first trophic level is the level of photosynthetic organisms they produce their food and energy on their own from the ultimate source of energy, the Sun. This is why they are called producers.
Producers have the most energy in any ecological ecosystem as all other organisms get food from these directly or indirectly. Only 10 percent of total energy is transferred from one trophic level from producers to the next tropic level through consumers of different trophic levels.
