Nitrogen and oxygen make up about 99%of the atmosphere. I'm not sure if it will help! But thats all I know.
Answer:
they developed some structures or parts to survive
the terrestrial environment
Answer:
The correct options are A and B
Explanation:
The two sentences that describe how meiosis differs from mitosis are - "Meiosis produces cells with half the chromosomes of the parent cell" and "Meiosis produces either male or female gametes."
Answer:
The word are semipermeable membrane; partially-permeable membrane; differentially-permeable membrane.
It allows the passage of only certain types of molecules through diffusion and occasionally by facilitated diffusion.
The expulsion of the embryo or fetus from the uterus before the middle of the second trimester is a condition called abortion. It is termination of pregnancy by removal or expulsion of an embryo.
Miscarriage is also that is known as spontaneous abortion which is unintentional expulsion of embryo within the 24 week and the most common cause of spontaneous abortion during first trimester is chromosomal abnormalities of embryo .
The health risk of abortion depend on the procedure is performed safely or unsafely. According to world health organization which is unsafe abortions as those performed by unskilled individuals.There is small diference in safety and efficiency between medical abortion using a combined regimen of mifepristone and misoprostal and surgical abortion in first startiung 3 weeks.
To learn more about spontaneous abortion here
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