Which sentence describes the action of natural selection? an ecosystem contains two types of giraffes, some with short necks and others with long necks. the distribution of this trait is equal among the population. a disease causes low-lying shrubs to die out. the long-necked giraffes can access more food, so they have a better chance of surviving to reproductive age. after several generations, all the giraffes have long necks.   the  long-necked  giraffes can access more food, so they have a better chance of surviving to reproductive age.

What is the function of the somatic nervous system? connects the brain and the spinal cord to the rest of the body carry signals to the muscles and glands includes all nerves controlling the muscular system and external sensory receptors controls internal organs like the heart and bladder

What are the three different shapes or structures shapes or structure of carbon-based molecules?

Imagine you are a student in alfred hershey and martha chase's lab in the late 1940's. you are given five test tubes with the e. coli bacteria that were infected with t2 bacteriophage that have been labeled with 32p or 35s. unfortunately, you forgot to label the tubes and are now uncertain which were 32p labeled and which were 35s labeled. you place the contents of each tube in a blender and pulse it for a few seconds to shear off the protein coats from the bacterial outer membranes. you then centrifuge the contents to seperate the protein coats and the bacterial cells. you then check for radioactivity and obtain the results shown below. which tubes contained e. coli infected with the phage labeled with 32p? select all tubes that apply.