5 is b because it makes more sense
The right answer to this question is option A. O2 in the atmosphere.
The main reason why it's a true that organisms would grow larger than we have today with more oxygen available is pretty simple to understand, their respiratory systems were smaller than we have today, and even though it was a small one, it was enough because of the higher presence and concentration of O2 in the atmosphere.
Some studies were held nowadays to check this possibility, to see if the O2 was the real main reason for this, and the animals used in it really grew bigger than usual, so by that, they confirmed their hypothesis by testing it.
Answer:
B) The mass of the reactants equals the mass of the products,
Explanation:
Given that the reaction is balanced, the mass of the reactants must equal to the mass of the products.
We know this by virtue of the law of conservation of mass.
The law of conservation of mass states that "in a chemical reaction, matter is neither created nor destroyed but atoms are rearranged".
Therefore, if the reaction is chemically balanced, the mass of reactants must be the same as the mass of the products in the reaction.
The second choice is the right one.
like i said before the answer is and always will be food sorry if this didnt help just tryna get some points haha
The nonnative organisms are introduced to new aquatic ecosystems in option "D" which is migration.
<h3>What is an aquatic ecosystem?</h3>
An aquatic ecosystem is an ecosystem in and encircling a body of water, indifferent to land-based terrestrial ecosystems.
Aquatic ecosystems have communities of organisms that are dependent on each other and on their environment.
Thus, migration is not a way that nonnative organisms are presented to new aquatic ecosystems related to trade.
To learn more about an aquatic ecosystem click here:
brainly.com/question/1061425