Which form of cell transport allows small molecules to move from one area of higher concentration to an area of lesser concentration without energy being required from the cell

A horse and a donkey can mate with each other. Their offspring, called a mule, is not fertile. Do horses and donkeys belong to the same species? Explain your answer.

A veterinarian wants to test a strain of antibiotic on calves to determine their resistance to common infection. in a pasture are 22 newborn calves. there is enough vaccine for 10 calves.

Which of the following statements about DNA repair is TRUE? A. There is no DNA repair system to deal with damage caused by exposure to ultraviolet light. B. All mutations are detected and fixed by DNA repair systems. C.

In a population, when the birthrate becomes higher than the death rate, the population's growth rate A) decreases. B) increases. C) slows to a stop. D) levels off and remains constant.

Select all that apply. Which of the following are characteristics of eukaryotes? A. single - or multi-celled structure B. no distinct nucleus C. membrane-bound organelles D. cell (s) larger than prokaryotes

You are given two sample tubes, each containing a white powder: your task is to determine if these powders are pure substances and two samples of same substance. briefly describe your strategy for completing your task.

What have you learned about heredity and genetics that could support?

1. If the sequence on a DNA molecule was CCTAG, the complementary sequence on the mRNA would be: GGAUC GGUTC GGATC UUATU

What is the chemical process for respiration A) releases APD B) releases energy C) releases oxygen D) releases glucose

Blood typing is an example of this where there is one gene but one gene can have several different characteristics