Answer:
Among vertebrates, external fertilization is most common in amphibians and fish. Invertebrates utilizing external fertilization are mostly benthic, sessile, or both, including animals such as coral, sea anemones, and tube-dwelling polychaetes. Benthic marine plants also use external fertilization to reproduce.
= Fish
Explanation:
Answer:
They once thought that humans came from monkeys and apes but now they think they come from a ancient ancestor not from the monkey or ape family.
Explanation:
Answer: crossing over allows for genetic variation
Explanation:
crossing over is the exchange of genes between two chromosomes which ends up resulting in non-identical chromatids that comprise the genetic material of gametes (sperm and eggs).
Basically crossing over makes the chromatids that are held together by a centromere, no longer identical to eachother which creates genetic variation.
Nuclear envelope.
Endoplasmic reticulum.
Golgi apparatus.
Vacuoles.
Vesicles.
Lysosomes.
Spitzenkörper.
Plasma membrane.
1. Eukrayotes cells contain membrane-bound organelles, such as the nucleus, while prokaryotes cells do not.
2. Eukaryotes are often multicellular whilst prokaryotes are unicellular. Although there are some exceptions –unicellular eukaryotes include amoebas, paramecium, yeast.
hope this helps!
