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❖ Before mitosis and meiosis occur, DNA replication has to occur. DNA replication is when another copy is made of the DNA and in mitosis and meiosis, you need the replicated DNA for the sister chromatids.
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Answer:
The correct answer will be option-A
Explanation:
Biodiversity refers to the diversity of the biological entities present in an ecosystem. Biodiversity has a wide spectrum which not only includes the number of the diversity of the organism but also the interaction between them.
The biodiversity is assessed to study the changes that are taking place in an ecosystem, to study the causes and how the changes affect the human well being.
The assessment decisions ignore the personal interests and the biasness as the aim of the approach is not fulfil the personal needs but to maintain sustainable management of the ecosystem.
Thus, option-A is the correct answer.
Answer:
Number 3
Explanation:
Number 3 or C is correct, "action of white blood cells when certain bacteria enter the body." This is the correct answer because white blood cells are in your body to fight off infections. some peoples immune system see these bacteria on the peanut, egg, or milk as an enemy so it tries to fight against it even though it is harmless to the body.
D. Man-Made is the answer
Aquatic organisms have external fertilization and reproduction is done through mating of male and female.
<h3>How do aquatic vertebrates reproduce?</h3>
All vertebrates reproduce through mating of male and female. Aquatic species generally have external fertilization, whereas terrestrial species usually have internal fertilization.
In conclusion, aquatic organisms have external fertilization and reproduce through mating of male and female.
Learn more about vertebrates here: brainly.com/question/10714806