The structure of DNA can best be described as a __________.

• double helix

• single helix

• duo helix

• triple helix

Tags

NGSS.HS-LS1-1

A student is testing how different amounts of heat affect lizard movement. What error has the student made while conducting the experiment? The first cage has one lizard, second one has two lizards, and the third one has 3 lizards.

• The experiment is missing a dependent variable .

• The experiment is missing an independent variable.

• The experiment has more than one control.

• The experiment has more than

  one independent variable.

Look at the equation. _. 6CO2+6H2O→C6H12O6+6O2. The equation for the process of photosynthesis is shown. Photosythesis porduces C6H12O6 which represents- (a)  

• water
• glucose
• chloroplast
• carbon dioxide

Tags

NGSS.MS-LS1-6

NGSS.MS-LS2-3

The three componensts of cell theory are the following:

• All living things are composed of one or more cells.

• All cells arise from preexisting cells.

• A cell is the basic structural and functional unit of living organisms

• All cells are considered to be non-living.

Tags

NGSS.MS-LS1-1

The 7 stages of the cell cycle are the following:

The stages of the cell cycle (interphase, prophase, metaphase, anaphase, telophase) can be remembered by using the mnemonic IPMAT. During anaphase the chromatids are pulled to opposite poles of the cell by the shortening of the spindle fibres. ...? What happens during metaphase?

• The nucleus dissolves and the cell's chromosomes condense and move together, aligning in the center of the dividing cell.

• A nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

• It grows, replicates its chromosomes, and prepares for cell division

• A nuclear membrane forms around each set of chromosomes to separate the nuclear DNA from the cytoplasm.

Tags

NGSS.HS-LS1-4

In the blank below order the following structures from the simplest to the most complex. The four structures are organs, cells, systems, and tissues.

Tags

NGSS.MS-LS1-3

A scientist finds an organism living in the superheated water near a volcanic vent. The organism has a cell wall and the lipids in the organism are very different from the lipids found in normal bacteria. The organism should be classified in the domain -

• Archaea

• Bacteria

• Eukarya

• Prokarya

Tags

NGSS.MS-LS4-2

All human beings have different fingerprints even though they are the same species. What type of influence causes this diversity among the same species?

• Mutations with DNA

• Environmental changes

• Natural Selection

• Genetic Variation

Tags

NGSS.MS-LS4-4

If a plant survives in the tundra it must possess an adaptation of tolerance to

• severe thunderstorm activity

• increased amounts of minerals in the soil

• more precipitation than normal

• really low temperatures

Tags

NGSS.MS-LS1-5

Over the past few weeks, Briana has been conducting an experiment to see what type of bread grows the most mold within a given period of time. She's chosen 6 different types of bread, and as time passed, she's measured the areas of each mold patch that's grown on the respective bread slices. What is her indepenent variable.

• Time (weeks passed)

• Bread Type

• Amount of Mold Growth

• Area of bread slices