Which characteristic is necessary for natural selection to occur in a species?

How many times does a typical person blink her eyes in a lifetime? mastering physics?

A blueberry bush uses energy from the Sun to make carbohydrates. Which set of energy transformations BEST describe this process? A. nuclear energy → chemical energy → radiant energy B. radiant energy → nuclear energy → chemical energy C.

While traveling through the rain forest of Peru, you are introduced to a rare and exotic plant. You discover that it contains a toxin that blocks the reabsorption of sodium ions from the proximal tubule.

Which of the following describes a function of the endoplasmic reticulum within a cell? intracellular transport DNA storage protein modification lipid synthesis

Plants with a internal tubal system that transports water and nutrients to different plant parts are vascular no vascular

How many different types of gametes can be produced by a plant with genotype aabbccddeeff?

What forms the rungs of the ladder of DNA?

Cuticular scale patterns in human head hairs tend to be very regular. Group of answer choices True False

Does Mitosis ever stop in cells? Explain your answer

Trichodesmium is a nitrogen-fixing cyanobacteria. Why might this cyanobacteria be important to other organisms in nitrogen-poor waters? They convert atmospheric nitrogen (N2) to organic compounds including ammonia (NH3).