What are 2 abiotic limiting factors that could limit the growth of a greenhouse full of tomatoes

  Light and Temperature

Explanation:

With more light, the photosynthesis occurs faster. In most cases the grower will try to have the photosynthesis occur as fast as possible. With a lot of light available, the temperature may go up. On darker days, a lower temperature is desired. Only with really high amounts and really low amounts, light can be influenced; respectively screening and supplemental lighting.

i think a) betsy can donate only blood to mark is correct because, mark and betsy have the same blood type. whereas nobody else has b+ blood so betsy can't donate to them.