Which plants are usually the first to grow during secondary succession?

trees

weeds

ferns

lichens

Ferns

Explanation:

The first species to colonize are usually fast growing herbaceous plants, such as conifers or ferns, which require high levels of light.

that scientist would be robert hooke

multiple allele inheritance is traits controlled by more than 2 alleles (ex: pigeons having 3 alleles of one gene govern their feather color).   so the answer is a.