Which of the following is true of the structures labeled A in the cell membrane? Choose 1

A
They are membrane proteins.

B
They are carbohydrates.

C
They are entirely hydrophobic.

D
They are phospholipids.

Natalie had random hand movements when she was two months old. when she was six months old, she used to grab a block with her whole hand. now at the age of ten months, she can grasp the same block with her thumb and forefinger. this sequence of growth in her hand and finger movements is according to the pattern.

List two limitations of natural selection

Which statement best describes the relationship between an allele and a gene? question 1 options: an allele is a variation of a gene that can be expressed as a phenotype. an allele is the part of a gene that attaches to messenger rna molecules. an allele is a segment of a dna molecule that controls replication of a gene.