Which statement about the giraffes explains their evolution based on charles darwin’s main points? a) the closest fossil ancestor to these giraffes would have a very short neck. b)all three of the giraffes have an equal chance of reproducing regardless of the environment. c)as a giraffe reached for food, the giraffe could make its neck longer making it better adapted to the environment. d)long necks were a random genetic change and resulted in the gradual increase of organisms with long necks.

How is ribosomal rna useful as a molecular clock? a. a large portion of the dna ring is not vital to structure or function, allowing it to accumulate neutral mutations. b. its rate of mutation increases over time as organisms continue to evolve and differentiate from each other. c. a slow mutation rate makes it useful for determining evolutionary relationships between ancient species. d. it is only found in select organisms, making it easier to compare relationships between species that have it.

1. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 50%25%0%100% 2. in a certain species of plant, the color purple (p) is dominant to the color white (p). according the punnett square, what is the probability of and offspring being white? 0%100%50%25%(picture 1 is for question 1, and picture 2 is for question 2)

What is a dendrite and what does it do?