Sexual reproduction in paramecia is called
conjugation
fission
meiosis

The correct answer would be conjugation.

Paramecia can reproduce sexually as well as asexually. In the case of paramecium, asexual means include binary fission and sexual reproduction involves the process of conjugation.

Conjugation is the process by which two paramecia unite temporarily and exchange genetic material.

In each paramecium, the micronucleus divides by meiotic division and produces four haploid nuclei out of which only 1 nucleus survives.

The survived nuclei divide with the help if mitotic division and forms two nuclei.

The two paramecia get separated after exchanging one haploid nucleus.

The new haploid nucleus and old haploid nucleus fuse with each other to form a diploid micronucleus.

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

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.