Answer:
A) Biotic
Explanation:
It's definitely not abiotic and nonliving because they are living and who would categorized 'excretions of living organism' "living".
Answer:
D
Explanation:
Its a 50/50 chance of being correct
Answer:
They were not around at that time or either from it being so hot they just disappeared/melted.
Explanation:
The effects may be minor such as blacking of the surface.
Answer:
The answer is 1/2.
Explanation:
Using a Mendelian cross, the two possibilities for an offspring to become heterozygous is when a parent is heterozygous recessive and the other is heterozygous dominant or vice versa.
If the case is 1/2 heterozygous dominant x 1/2 heterozygous recessive then the offspring will have 1/4 dominant and recessive genotype.
If the case is 1/2 heterozygous recessive x 1/2 heterozygous dominant then the offspring will have 1/4 recessive and dominant genotype.
So the probability totally is 1/2.
I hope this answer helps.