Answer:
The correct answer would be zygote...blastocyst...embryo...fetus.
The fertilization of sperm and egg results in the formation of zygote. It receives genetic material from a male as well as a female parent.
It divides with the help of mitotic divisions and results in the formation of 2, 4, 8, and 16 celled stages.
It results in the formation of the hollow spherical ball of cells termed as a blastocyst. The cells are distributed to form the outer layer termed trophoblast and inner cell mass which gives rise to the embryo.
Trophoblast help in the implantation of the blastocyst into the uterine wall.
The cells of the embryo undergo organogenesis during different organs such as heart, brain, lungs et cetera are formed.
In humans, almost 9 weeks after the fertilization the developing embryo is considered a fetus.
The fetus development continues until birth.
Answer: A.
Explanation:Weather radar, also called weather surveillance radar (WSR) and Doppler weather radar, is a ... Between each pulse, the radar station serves as a receiver as it listens for ... If pulses are emitted too frequently, the returns from one pulse will be ... Over the area covered by radar echoes, a program assigns a precipitation type
Answer:Animals in the desert are adapted to the hot climate.
Most live underground to stay cool.
Explanation:
Answer: water is a pure substance
Explanation:
