Placenta protects the fetus during the germination period where the mother's system cares for itI think the closest possible answer to this question is Oxygenates the fetal blood, delivers nutrients, removes wastesThank you for your question. Please don't hesitate to ask in Brainly your queries
They are considered invasive because they out-compete native fishes for resources
A control group is different because it is not what is being tested. for example the control group would use sugar pills while the other group uses the pills being tested
Answer:
a. positive ion , +1
b. negative ion , -1
c. ionic
9. NaCl, NaBr , NaF
Explanation:
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