B. Primary lactose is often seen in crohn's disease!
Answer:
Minerals always occur in nature, they are solid and are inorganic. They have a crystal structure and each mineral has a unique chemical composition. I'm sorry but I don't know what the relationship between the enzymes and minerals is called.
20. The answer is 1 (Precambrian)
21. The answer is 4 (Pennsylvanian)
22. The answer is 2 (Bony Fishes, Dinosaurs, and Mammals)
23. The answer is 2 (Reptiles)
Answer:
d. They are often keystone species
Explanation:
Top predators in an environment are the largest predators and sits on the top (apex) of the food chain in an ecosystem which do not have any natural predators.
As the top predators relative to its abundance has disproportionately large effect on its natural environment, they are the keystone species most of the time.
Hence option d. They are often keystone species is the right option.
Answer: <em>Mitochondria, nucleus, Golgi apparatus, ribosome, vacuole.</em>
Explanation: