What type of atom is at the center of the chlorophyll porphyrin ring?

What factor is often related to the onset of puberty for females?

What country and state does Jacob sartorius live in?

Which of these is an abiotic factor of an aquarium ecosystem? A. algae growing on the glass B. gravel on the bottom of the aquarium C. plants growing from the gravel D. fish swimming in the water

Is a virus a living thing?

The pressure exerted by the blood against the walls of the blood vessels is known as

How long can food that requires time-temperature control be left in the danger zone? A. A maximum of 3 hours B. A maximum of 4 hours C. A maximum of 1 hour D. A maximum of 2 hours

Explain the characteristics of this soil sample that likely allowed Judy to make this identification. Include particle size and texture in your response.

Rick uses an electronic air sampler to determine the amount of dangerous chemicals in the air. Which functions of the air sampler confirm that it is an electronic tool? Check all that apply. It collects chemical data.

Prokaryotic cell lacks membrane - enclosed structure is called?

Humidity is water vapor in the air. Infer how plants contribute to humidity.