4. If a scientist is observing biotic and abiotic factors, which of the following level of organism must she be studying?

A. An ecosystem

B. A community

C. A population

D. An individual organism

Chino wanted his sunflowers to grow tall. He put three small sunflower plants into a pot with some soil. Then, he placed them on the windowsill. After six weeks, the flowers had not grown and were dying.

Based on current information, cosmologists expect the universe to

Shape is the most important quality of a protein. what gives any protein its correct shape

Which statements regarding heart failure in older adults are true? select all that apply?

What best explains the observation of an enzyme being selective in the reaction it catalyzes? a. Reaction-specific enzymes assume a fit by folding around the most numerous substrate molecules. b.

Within which structure does the placenta normally develop

A 29-year-old female presents with fever, cloudy urine, flank pain, and hematuria. these signs and symptoms support which diagnosis

What is the term for a male reproductive cell?

What happens if people keep killing sharks and who wants to stop it and how may do we kill a year

In which conditions did the water move through the cell membrane when the cell was surrounded?