Ablastocyst is associated with which stage of the reproductive cycle? a. puberty in the offspring b. the first trimester of pregnancy c. the second trimester of pregnancy d. the third trimester of pregnancy

The correct answer is A) Puberty in the offspring.

Blastocyst is a structure of cells that is formed after five days of fertilization. It possesses an outer layer of cells called trophoblast ( that forms major part or the placenta to provide nutrition to the developing embryo) and an inner cell mass ( that forms the whole embryo).

It is implanted in the uterus after the zona pellucida ( layer outside blastocyst) is broken down.

Pregnancy is divided into three trimester with three months in each trimester.

As blastocyst is the structure that is implanted in the uterus, therefore it is associated with the first trimester of pregnancy.                

the correct answer is - d. china has a large and growing population.

the fact that china has a large (the biggest) population, and it is still growing, doesn't hinder the agriculture production in the country. in fact, it can for increased production in the agriculture, since there's more labor force, as well the sheer mass of people produces lots of scientists that come up with new inventions as to how to improve this sector. nice example is the inner mongolia region in china, in general dominated by the gobi desert, but few scientist came up with a nice idea as to how to make the region productive by using plants that are very resistant to droughts, so lots of people have been employed, and the region is becoming greener and greener each year, and the production of food in this region is also increasing.

its temperature is increasing. this causes molecular vibrations to increase.