What are chemical messengers that can travel through the bloodstream and tell cells in the body what to do.

What reproductive benefits do angiosperms have over mosses? This is for my biology course. It was a question on one of my assessments and I got it completely wrong. Can someone explain it to me so I can at least try to understand it?

Type the correct answer in the box. Spell all words correctly. Which type of interaction is described below? ] interactions occur between individuals of the same species.

How could a mutation to an amino acid chain cause no change to a cell's structure or function?

When both muscles of this pair are contracted simultaneously, they flex the neck forward. When both muscles of this pair are contracted simultaneously, they flex the neck forward. a. platysma b. semispinalis c. sternocleidomastoid d. trapezius

approximately 2.2 billion years ago which gas was first added in large amounts to earth atmosphere from life forms that evolved in the oceans

Which trait did Gregor Mendel examine from the pea plant when he planned his study? a plant height b color of the plant flower c traits that were easy to distinguish d all of the above

In a laboratory population of flies, the female flies are gray and the males are yellowish gray. Biologists observed that all the male flies had an equal chance for reproduction, but the male flies with the brightest colors were more likely to

There appears to be some relationship between population density and the presence of large dead zones.

Detail the relationship between diploid cells and homologous chromosomes

Each P1 parent of a monohybrid cross has completely identical genes ture false