Which is true in a covalent bond?
question 9 options:

the bond forms between ions.

the bond forms when electrons are shared.

the bond holds atoms weakly.

the bond is caused by van der waals forces.

African penguins, which inhabit the coasts of southern africa, were classified as an endangered species in 2010. two significant threats to their survival are ecosystem damage from oil spills and overfishing by humans. overfishing depletes the food supply of african penguins. the best method to reduce the threat of overfishing would be to . the risk of oil spills could be reduced by increasing the use of , which should oil consumption. if an oil spill does occur, could be used to remove the oil so the ecosystem may more quickly recover.

When you run, you begin to breathe heavier and faster. your heart beats more quickly, bringing more oxygen to your cells. which organ systems are working together here?

Fungi are classified into how many groups? a. 1 group b. 2 groups c. 3 groups d. 4 groups