Answer: option 3. hollow forms are left in sediment by decaying organisms.
Explanation: Fossils usually form when sediment buries a dead organism. As sediment piles up, the organism's remains are subjected to pressure and heat. These conditions force gases and liquids from the body. A thin film of carbon residue is left, forming a silhouette of the original organism called a carbon film.
i’m not fully confident in this answer though :/
Pairs of alleles can be either a 2 capital letters (such as AA), 2 lowercase letters (such as aa), or 1 capital and 1 lowercase letter (such as Aa).
To be dominant, an allele pair must have at least 1 capital letter. Any allele pair with both lowercase letters is recessive.
2 capitals (AA) is homozygous dominant. Homozygous because both letters have the same capitalization and dominant because there is at least 1 capital letter.
1 capital and 1 lowercase (Aa) is heterozygous dominant. Heterozygous because the letters have different capitalization and dominant because there is at least 1 capital letter. Heterozygous is always dominant.
2 lowercase (aa) is homozygous recessive. Homozygous because both letters have the same capitalization and recessive because both letters are lowercase, so there are no capitals.
So the answer is 2, there must be 2 recessive alleles for an organism to have that trait be recessive.
I think your answer should be B. an organism. Hope this helps. =^-^=
Answer:
Stars are formed within clouds of dust...