C is incorrect. Density is not affected by gravity.
Answer: It could be that B, that the light wasn't strong enough
Explanation:
I'm not sure, but the plant didn't grow towards the light, so that's a possible answer I saw
Answer: 37 chromosomes.
Explanation: As is typical of mammals, llamas are diploid organisms, meaning that the number of chromosomes in each of their somatic cells is exactly twice of that found in the gametes (the so-called haploid number, referred to as "n"). If a particular species has 74 chromosomes in its somatic cells, we should expect to find 74/2=37 chromosomes in each gamete.