Which organelle is the control center of the cell?

vacuole

endoplasmic reticulum

cytoplasm

nucleus

Match the researchers with their discoveries. Demonstrated the phenomenon of transformation, but did not identify the transforming principle. Answer 1 Identified DNA as the genetic material in bacteriophages. Answer 2 Determined the structure of DNA.

Is this statement true or false? The rotation of earth on axis is one of the causes of the daily tidal cycle. true false

Given the energy charge equation below, if a biological system has an EC = 0.8, what is true about the concentrations of ATP, ADP, and AMP in the system? Choose an answer choice and explain why. EC = [ATP] + 0.5 [ADP] / [ATP] + [ADP] + [AMP] a.

A microbiologist has identified a new gram-negative pathogen that causes liver disease in rats. She suspects that the bacterium's fimbriae are a virulence factor. Describe how molecular Koch's postulates could be used to test this hypothesis.

A purebred purple flowering plant is crossed with a purebred white flowering plant, and they produce offspring that have purple flowers. Which is the trait for purple flowers?

Is a chameleon a lizard?

Which answer is a type of muscle tissue in the human body humoral cardiac digestive pulmonary

Select all the correct answers. According to Newton's law of universal gravitation, which statements are true? As we move to higher altitudes, the force of gravity on us decreases. As we move to higher altitudes, the force of gravity on us increases.

To amplify and express a gene of interest, it must first be cut out of the chromosomal DNA and inserted into what? A) restriction enzyme B) agarose gel C) vector D) none of these

Which statement is correct about the total mass of glucose and oxygen formed during photosynthesis? It is equal to the total mass of carbon dioxide used. It is less than the total mass of carbon dioxide used.