Answer:
D
Explanation:
it has to be D because its talking about "how does a volcanic ash affect water systems"
Please mark brainliest
Answer
The answer for first fill in the blank is “ positive”
The answer for second fill in the blank is negative
Humans Come From A Guy Sperm It Goes Into The Females Egg
Answer:
it's usually because they have no predators or very little
Explanation:
Having no predators means a lot of growth for the organism. this can easily lead to extinction of other organism
For him they were just discrete physical units of inheritance. Johanson coined the term "gene" and people started calling them genes. Today for us these factors are parts of DNA, the base sequences that carry the biological information to determine a trait. Mendel factors are alleles of genes.
