Q2 Polydactyly is an inherited condition caused by a dominant allele.
People with polydactyly have extra digits on their hands or feet. A man's mother also has
polydactyly, but his father does not.
The man is heterozygous for polydactyly.
Explain how the information given above shows that the man is heterozygous for
polydactyly.​

answer: land bridge theory. land bridge theory held that shifting portions of dry land explained the finding of identical species on different continents. plate tectonic theory eventually eliminated the land bridge theory.

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.

protistas excret ethanol used in the manufacture of vinegar