Answer:
Mammals first appeared
Explanation:
The dinosaurs became extinct one million years after the Cenozoic era started. The mammals first appeared as the modern culture first appeared in that era.
During the cell cycle, the centrioles are made during interphase. The centrioles move to opposite sides of the cell and spindle fibers form a bridge between them during prophase, which is one stage out of the four stages in mitosis.
2 degrees Fahrenheit and ~ 1 degree Celsius
D. DNA replication
DNA always forms proteins
Answer:
The correct answer is D. zygote and finally develops into a fetus
Explanation:
Zygote is formed by the fusion of male gametes and female gametes. It is considered as the first stage of development of a baby. Zygote is a unicellular structure which develops into an embryo which is a multicellular structure.
Then this embryo develops and is called a fetus at the starting of the 11th week of pregnancy. A developed fetus is the final stage of prenatal development.
Therefore during successful prenatal development, a human baby begins as a zygote and finally develops into a fetus. So the correct answer is D.
