BRAINLIESTT
List and define four types of scientific models.

It began after the stock market crash of October 1929, which sent Wall Street into a panic and wiped out millions of investors. Over the next several years, consumer spending and investment dropped, causing steep declines in industrial output and employment as failing companies laid off workers.

1. Physical models: smaller and simpler representations of the thing being studied. Eg. A globe or a map is a physical model of a portion or all of Earth.

2. Conceptual models: ties together many ideas to explain a phenomenon or event.

3. Mathematical models: sets of equations that take into account many factors to represent a phenomenon. Mathematical models are often done on computers.

4.  Mental models: personal and internal representations of external reality that people use to interact with the world around them. They are constructed by individuals based on their unique life experiences, perceptions, and understandings of the world.

answers are:

lysogenic     viral dna merges with host cell dna

lysogenic     no symptoms

lytic               viral dna takes over

lysogenic     virus does not destroy host cell

lytic               virus destroys host cell

lytic               induces symptoms of viral infection

lysogenic       cell reproduces and spreads provirus

the correct answer is option d.

an appositive is a noun, noun phrase or noun clause which follows another noun or noun phrase in order to describe it or name it another way. they are usually used between commas, brackets or dashes.

the example sentence with the correct use of commas is the following:

her uncle, the man over there in the red shirt, owns the hardware store in town.