In how many different ways can 7 swimmers be lined up for a race?

5040

42

332

72

What would happen if the cell membrane became impermeable?

How does skin prevent entry of micro organism in the body

What is conduction or the definition of conduction

In 1900, more than 30 percent of deaths in the U. S. were caused by infectious disease. In 2005, what percent of deaths were caused by infectious disease?

Humans cannot convert the Sun's energy into glucose for themselves because humans lack

Why the children in a family may have different genotype and phenotype than predicted by the punnet squre

What is meant by the term "chemically gated sodium channel"? Group of answer choices A membrane channel that opens when some chemical binds to it, allowing sodium to cross the cell membrane A membrane channel that opens when sodium binds to it,

Scientists now know how much carbon dioxide was present in the atmosphere as far back as 800,000 years ago. How did they obtain this data?

How do farmers contribute to water pollution?

Which of the following best describes REM sleep?