Of the three classes of elements, which class includes the majority of the elements

Why might introduction of exotic species disrupt an ecosystem? A. They're struggling to survive and can be disruptive. B. They die quickly and overfeed scavengers. C. There are very few of the organisms present. D. They can outcompete native species.

RNA polymerase: Group of answer choices 1. can synthesize RNA chains without a primer. 2. binds tightly to a region of DNA thousands of base pairs away from the DNA to be transcribed. 3.

when earths shadow falls on the moon the shadow causes a 1) high tide 2) low tide 3) lunar eclipse 4) moon phase

Jane, a 79-year-old woman, has been diagnosed with a tumor in the brain. She has lost some sensory and motor functions associated with the face, like control of facial muscles for emotion and various sensory functions like taste.

A friend of yours is trying to get pregnant. she is asking you on which day (s) during her menstrual cycle would she have the greatest chance of conceiving? (conceiving means fertilization)

A cuticle occurs on the surface of organisms of many phyla and appears to be an advantageous feature. why have higher organisms not retained this structure?

After complex organic molecules have been absorbed in the small intestine, what materials are left behind?

What makes the trash in this landfill more of an environmental blight than the trash found in other trash dump areas? A) It is bigger. B) It is smellier. C) It won't disappear. D) It is harder to see.

What effects do currents have on objects in the ocean

Write the mrna base sequence that would result from the transcription of this segment of dna