C. Allantois stores waste products produced by an embryo
Most of the changes in an ecosystem are gradual. The gradual changes taking place in the ecosystem allows the organisms to evolve slowly. As a result of evolution, the species can adapt and survive in the changing environment.
Also, the gradual changes allow speciation and other ecological advantages. Any sudden changes in the ecosystem can be drastic, as all the organisms would not be able to adapt the sudden change, as a result they will extinct.
Answer: off: lac repressor, on: CAP
Explanation:
Hypothalamus
The hypothalamus maintains a steady internal environment for the body.
The hypothalamus is a complex part of the brain that is located under the thalamus and above the pituitary gland. One of the main roles of the hypothalamus is to maintain homeostasis by keeping the human body in a balanced condition. The hypothalamus plays a part in various important functions of the body such as appetite and weight control, body temperature, emotions, sleep cycles, stress, blood pressure and levels of hormones in the circulation.