<span>The cell is too large.
The surface area to volume ratio.
The Cell is too old and is not efficient anymore.</span>
Answer:
Asexual reproduction in animals occur through fission, budding,e.t.c.
Sexual reproduction starts with the combination of a sperm and egg which is called FERTILISATION.
Explanation:
The reproductive parts in animals produce gametes that fuse and form <u>ZYGOTE</u>.
Okay, hope it helps.
Most important thing is that you should have a perfect sense of your environment observe it yet study it.
Biology is a 'scientific nature '.
LIVE IT. SENSE IT. FEEL IT.
D.) A collection of data that generates a scientific observation