Answer:
B Fluorine is the most reactive because it has 7 electrons in the outer shell.
Explanation:
The valid conclusion about the reactivity of the elements is that fluorine is the most reactive because it has 7 electrons in the outer shell.
- Reactivity of elements is in a bid to attain a stable configuration of their atoms.
- Fluorine belongs to group 7 on the periodic table.
- To complete its octet, it requires just one electron.
- This makes it very reactive
- On getting an electron, it becomes like the nearest noble gas, Neon.
Answer:
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Evidence for evolution reveals that closely related organisms have many similar physical and genetic characteristics.
Explanation:
Closely related organisms have similar physical features and genetic sequences.
When both the physical and genetic features are similar, these organisms are referred to as homologous structure.They are similar, as their evolutionary path is the same.
Example: bones from the birds and arms of the humans, have evolved more or less similarly so they are homologous structure.
In other cases, the organisms might be closely related, but their genetic structure might have a slight change. Due to this change there might be difference in the physical structure.
Example: the chimpanzee and human have different physical structure even though their evolution have taken the same path and they are closely related.
Answer:
A predator-prey example: hammer head shark vs crustacean (crabs and things)
A parasite-host example: again, leech vs something like a tuna (fish)
A consumer-consumer example: muscles vs starfish (not confident on this one)
A consumer- producer example: phytoplankton-shrimp (again, not confident)
Explanation:
hope it helped
(baleen whale image)