Answer:
Atoms combine when their electrons are shared or transferred
B.
H in HF is slightly positive while O in H2O is slightly negative. So they attract in a polar bond. Btw I thought this is chemistry.
Answer:
The preservation of biodiversity provides a vital link to critically expand the molecular diversity necessary for successful drug discovery efforts in the future. ... This ongoing loss of biodiversity is altering ecosystem functions and the ability to provide goods and services for human health and well-being
Explanation:
Replication should be included in an experimental design.
It would be B. A keystone species. Keystone species play important roles in ecosystems and when they are removed this can make an entire habitat collapse
