Sponges are a type of aquatic animal whose body is covered in tiny pores called ostia. The ostia allow water, oxygen, and other nutrients to flow into the sponge's body, and for waste products like ammonia and carbon dioxide to exit their body. The respiratory system of a sponge is based on the process of diffusion.
Answer:
False.
Explanation: Fertilization is a process in sperm cell combine with egg cell.
In human beings, fertilization occurs internally. During fertilization, sperm of male combine with egg of female inside the female body which changes into zygote. After sometime, zygote turns into a new baby. About nine months, the baby comes out from the body of female.
Answer:
Polyploidy arises as the result of total nondisjunction of chromosomes during mitosis or meiosis.
Explanation:
Traits are located on "Chromosomes" in the nucleus
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Answer:
They should not continue with research of stem cells
Explanation:
