There is a Fox a beetle and a bird and grass
Answer:
4) It allows the exchange of nutrients between the embryo and the mother, while at the same time filtering out harmful material.
Explanation:
The placenta is an organ present in all mammals. She is confirmed between the 6th and 8th week of pregnancy and has as main function the exchange of substances between the mother and the fetus. Among these substances are nutrients, gases and even secretions. The placenta also has the function of fighting infections and promoting immunity to the fetus, in addition, it can act as the lung, the intestine and the liver, while the fetus does not develop its organs.
I Live in NC and so we haaadd yo learn this! I personally think it's the Gulf Stream.
The lithosphere, hydrosphere,biosphere and atmosphere
(I hope this helps)
Answer:
Human gametes should contain <u>23 </u>chromosomes each. This number would be considered the <u>haploid </u>number for humans. The symbol for this is <u>n</u>.
Explanation:
Gametes are an organism's reproductive cells. Female gametes are called egg cells, and male gametes are called sperm.
In most organisms, somatic cells (all cells except for gametes) are diploid, whereas the gametes tend to be haploid. Haploid cells have a single set of chromosomes, while diploid cells have two sets of chromosomes.
When it comes to human cells, somatic cells have 46 chromosomes. This means that each gamete has 23 chromosomes. This is called the haploid number and is marked by a lowercase <em>n</em>. This number refers to the total number of chromosomes found in a gamete (for human cells n=23).
