How many different types of aminoacyl trna synthetases are there?

The table presents the average day and night temperatures in five cities. it also reveals whether a city receives substantial rainfall (wet climate) or little rainfall (dry climate). which city’s rocks are likeliest to experience frost wedging, and why? a) city a because the consistently subzero temperature would prevent water from melting b) city b because it is a wet region and the temperature fluctuates around the freezing point c) city c because it receives plenty of rain fall and the weather is moderately cool d) city d because the hot and dry weather would cause rocks to absorb water

How do primates acquire food? a. through a limited set of highly specialized foraging strategies b. through the use of highly developed material culture c. through cooperation among kin groups, mostly by hunting d. through a wide variety of food-foraging strategies

As human red blood cells mature, they lose their nuclei. as a result of this loss, which process would be impossible for mature red blood cells to carry out?