Question

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Answer 1

Answer:

The zygote is the initial stage in baby development. It is also known as a fertilized ovum formed from the union of the sperm cell and the egg cell. Foetus refers to the final stage in baby development. An embryo is termed as the foetus in the beginning in the 11th week of pregnancy.

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Answer 2

Organisms that are single-celled, swim in the water and consume food are generally called protozoa. They belong to the kingdom Protista and are classified into different phyla based on how they move. The amoeba, which belongs to the phylum Sarcodina. This single-celled protist can be any shape it wants because its membrane is flexible and it can push its cytoplasm around to change its shape. The word amoeba means to change. Paramecium moves using tiny hair-like structures on its surface called cilia. The paramecium belongs to a whole group of protists that move using cilia, the phylum Ciliophora.