When do scientists believe life originated on Earth?

A.

3 to 4 billion years ago

B.

600 million years ago

C.

less than 6,000 years ago

D.

over 5 billion years ago

In some cases of head injuries the cerebrum maybe be affected. The type of injury could cause a loss of (blank) and impaired (blank)

Select three ways a virus can enter a cell. a. The virus dissolves the cell membrane and then exits the cell. b. The virus remains inside but injects DNA or RNA out the cell. c. The virus remains outside but injects DNA or RNA into the cell. d.

Genetic Modification, or Gene Editing, is a type of bioengineering that denatures the pathogenic proteins to cure the disease O exchanges the genes among the cells to enhance the diversity modifies DNA in order to improve the host or its offspring O

Injuries in the environment are a result of

The type of RNA that ribosomes are made of.

Which of the following is directly caused by gravity

Anna is a morally rigorous person who demands that her daughter remain a virgin until she is married. Anna cannot remember her own premarital sexual encounters. Which defense mechanism would likely account for this memory lapse?

Because plant-like protists make their own food from sunlight, in what kind of environment would they not be able to survive? Why?

Where is the respiratory electron transport chain in prokaryotes?

A specific molecule was separated from a yeast cell and then placed in a flask to find out if it would bind to another molecule. This type of experimental design is called a (n) A. in vitro observation B. occupational cohort study C.