What does a human neuron use to send a signal to the brain in response to a stimulus such as touch?

A. myosin and actin

B. contraction and relaxation

C. respiration and absorption

D. electrical signals and chemical neurotransmitters

Consider the following scenario. A group of antelope separate from their population and travel to a new area in search of food.

Lions eat zebras. Zebras are part of the lion's * a. biotic factors. indd b. ecological niche. niche. c. local habitat. tat. d. abiotic conditions.

Antibiotics are not useful for treating the common cold because: A - antibiotics attack only things. B - colds are cause by antibiotics. C - bacteria produce many antibiotics. D - viruses are causes by bacteria.

Use the drop-down menus to complete the statements. In the first step of meiosis I,. In the second step,. In the third step,. In the final step of meiosis I,

Examine the results of an experiment above discussing how temperature affects cellular respiration. Which of these best explains why the control is used in this experiment? A) It ensures that the yeasts are dormant until exposed to sugar.

What it a dilute solution

Is Chitin a Carbohydrate or a Protein?

You want to compare the evolutionary relationships between four species of birds, which of the following would be most useful? Question 1 options: A) nesting behaviors B) DNA sequences C) color of feathers D) patterns of migration

Two hypotheses about how life supporting molecules appeared on earth

Dna strands serve as which of the following during dna synthesis