It's Gametes Sexual reproduction is the union of male and female gametes to form a fertilized egg, or zygote. The resulting offspring inherit one half of their traits from each parent.
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Ok so it will be the first one but it migt be the second on for the simple fact that they both use CO2 and O2
I might be wrong because i am working on that to in my Bio class
All of the above I believe is the correct answer
A holdfast is a root-like structure that anchors aquatic sessile organisms, such as seaweed, other sessile algae, stalked crinoids, benthic cnidarians, and sponges, to the substrate.
Macromolecules are mostly made up of monomers linked into polymers.
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What are macromolecules?</h3>
Macromolecules are made from subunits or building blocks of monomers. These monomers combine with one another through covalent bonds to form larger molecules that are called polymers.
Therefore, macromolecules are made of monomers which are subunits that make up polymer.
For more details on macromolecules kindly check brainly.com/question/5246898