help me ??

Question

two organisms of the same species differ in only a single trait. they are crossbred to analyze how the trait will be distributed.what is this procedure called?
a. completeness cross
b. dihedral cross
c. monohybrid cross
d. selection cross

which of the following is the correct term for the process by which an advantageous genetic mutation spreads throughout a species??
a. dominance
b. genetic drift
c. monohybrid crossing
d. natural selection



Plants capture energy from sunlight using properties of chlorophyII and other light-absorbing pigments. explain why chlorophyII makes plants leaves appear green.

at least 3 sentences for this one......

one of the simplest types of animal is the sponge. the sponge has a multicellular structure and specialized cells for digestion, water circulation, reproduction, and external covering. which of the following does the sponge lack?
a. sperm and eggs
b. tissues and organs
c. a supporting skeleton
d. genes and chromosomes

Answer 1

1. C monohybrid cross
2. D natural selection
Chlorophyll makes plants look green because they absorb red and blue light the best. However, they dont' absorb green light very well, and so the reflect green light. You see it as green because they absorb all the other wavelengths. The leaves are green, and sometimes the stem, because they are the organs of the plant which contain chloroplasts.

B. Sponges (phylum Porifera) are the only animals which do not have tissues or organisms.