D:viruses are not killed by antibiotics.
It theorizes that the universe is constantly expanded, in other words getting bigger.
Answer:
An ecosystem is a community of living organisms in conjunction with the nonliving components of their environment, interacting as a system.
Explanation: These biotic and abiotic components are linked together through nutrient cycles and energy flows.
5) stems are bare is the correct answer
the is a definite article meaning that you cannot use it
"an" can only be used before words beginning with vowels
therefore the answer is" a"