Flu shots are vaccines against the most common strains of the flu virus. most vaccines are rarely changed but new flu vaccines are produced every year. why are flu shots constantly being reformulated? the flu virus is not completely known.

What is the end result of natural selection? A. increased number of offspring of a given phenotype that survive B. changes in the frequency of alleles in a population C. fossil formation through extinction D. environmental changes of a habitat

During which century did charles darwin come up with his theory?

DNA in a solution is negatively charged; if you ran a sample of DNA, what would you predict about its migration?

Double membrane that separates the nucleus from the cytoplasm

Which of the following is true about the movement kf plate tectonics

Viruses are different from bacteria in that they can remain dormant on nonliving surfaces they can be found just about anywhere they can infect just about any form of life

Which of the following lists three popular chuck cuts?

Explain the relationship between photosynthesis chlorophyll thylakoids and chloroplasts

What type of carbohydrate is in rice?

Immediatley after one of your skin cells completes mitosis, each of the resulting daughter cells is?