If a repressive protein attaches to the operator RNA polymerase cannot attach to the promoter.
Repressor is a protein which binds to the DNA (or RNA), more precisely to the operator or associated silencers
and thus inhibits the expression of one or more genes. Its mechanism is to block the attachment of RNA polymerase to the promoter. As a result, transcription is stopped.
Answer:
The symbiotic relationship between an anemone (Heteractis magnifica) and a clownfish (Amphiron ocellaris) is a classic example of two organisms benefiting the other; the anemone provides the clownfish with protection and shelter, while the clownfish provides the anemone nutrients in the form of waste while also scaring
Explanation:
I asked the same question
Explanation:
Why (for what reasons) is it believed that oxygen was not present when life formed on Earth? The life forms were anaerobic, and did not make oxygen. There is a lack of oxidized iron in rocks that are a few billion years old. Eventually oxygen from the oceans moved into the atmosphere, and iron could be oxidized.
Answer:
mate guarding
Explanation:
Mate guarding is a behavior adapted by any member of a pair to prevent the other mate of the pair from going after other potential mates or prevent other potential mates from having access to an individual’s mate. This behavior is exhibited by both males and females to retain sexual access to a mate while increasing reproductive opportunities. An example of this behavior can be seen in lizards. Male lizards ensure they stay close to their female mates to ward off potential mates.
