A student wanted to know the most effective way to grow bacteria in a lab. He conducted a descriptive investigation instead
of an experimental investigation.
What is a limitation of his investigation?
O A descriptive investigation cannot show a cause-and-effect relationship between bacteria growth and possible factors
affecting growth
O A descriptive investigation is always more expensive than an experimental investigation
O A descriptive investigation usually does not involve much data collection to support a hypothesis.
O A descriptive investigation provides little prior knowledge or background information about bacteria arowth.

yes, because even though a theory has a  lot of evidence to support it, it is not always true

the ems is the abbreviation for the emergency medical services. it is a service provided by a group of medical professionals specialised doctors and other healthcare staff.

any one can call 911 in case of any medical emergency and a group of health care professional will come and give the treatment required. every day the ems staff receive many phone call, which are related to different types of medical emergencies, out of which 25-28% are exclusively related to the respiratory issues.

so, the correct answer is 25-28%.

the answer is either a. or d. if you're talking about fully electric cars, then the answer is a. if you're talking about hybrid cars, the answer would be d.