Which TWO phrases describe the contents of a chromosome?

A. A single gene

B. Many genes

C. Many DNA molecules

D. A single DNA molecule

Unlike a lytic infection, a lysogenic infection A. involves a host. B. requires a virus to inserts its nucleic acid into a host cell's DNA. C. damages the host cell and causes it to burst D. involves a virus and its nucleic acid.

Which of the following is an isotope pair used to determine the age of fossils

Paulo makes the argument that the asteroid strike that likely contributed to the extinction of the dinosaurs was a short-tem environmental change because it happened so quickly.

Chemical reactions will occur independently of the reactants temperature. True/False

List the three main ideas of the cell theory Explain your work

The table compares the features of two plant species that exist near the shoreline in South Florida. Tree Species Data Tree Species Shade Provided Native Low Exotic High The nesting sites of sea turtles are more successful when the sites have more

A student measures the length of a glass rod five times and records the data as: a. 23.487 cm b. 23.493 cm c. 23.516 cm d. 23.501 cm e. 23.477 cm The labeled value of the glass rod is 23.490 cm.

Which example involves a cell membrane receiving and sending messages? A. A transport protein allows glucose to enter a cell B. A fox chases a mouse through the forest C. A cell tells other cells that danger is near D.

What is the name of the process that develops reproductive cells in males? oogenesis spermatogenesis fertilization polarization

If organimsbare of the same aprecies?