biology unit 1

Which of the following is an example of an organism maintaining homeostasis??

• A plant using the openings on its leaves, stomata, to exchange gases and evaporate water to allow more water to get into the plant

• A Runner perspiring while running on a hot summer day

• The human body releasing insulin to keep blood sugar steady

• The maintain ace of a body temperature around 98.6 degrees F

• All of the above

Why is the water molecule polar??

• The electrons spend more time around Hydrogen

• The electrons spend more time around Oxygen

• The water molecule has ionic bonds

• The water molecule has no polarity

Tags

NGSS.MS-PS1-1

Why do the shared electrons in the water molecule like to spend more time with Oxygen?? (this causes a polar covalent bond)

• •A- Hydrogen has more protons than oxygen

• •B- Oxygen has more protons than hydrogen

• •C- Oxygen and Hydrogen have equal amounts of protons

• •D- True Love

Tags

NGSS.MS-PS1-1

which of the following represents the smallest level of biological organization?

• organs

• populations

• cells

• tissues

Tags

NGSS.MS-LS1-1

NGSS.MS-LS1-2

Which of the following is the best example of a scientific model?

• a turtle terrarium in a pet store

• a computer database of types of algae found in a lake

• the polar bear habitat at the zoo

• a computer simulation of projected algae growth in a pond

Tags

NGSS.MS-LS2-3

The identity of an atom is based on...

• the number of electrons it has

• the number of protons it has

• the number of neutrons it has

• the number of shells it has

Tags

NGSS.MS-PS1-1

which kind of bond occurs when atoms transfer electrons and as a result are oppositely charged and bonded together?

• ionic

• covalent

• hydrogen

• polar covalent

which statement best explains why a new scientific investigation would be performed to test a theory that is already accepted?

• discovery of new evidence

• loss of funding for new theories

• lack of availability of new theories

• public pressure and demand for change

trees use narrow tubes to transport water upward. which property of water does this involve?

• high specific heat

• net charge of molecule

• cohesion and adhesion of molecules

• desity of molecules

which of the following statements concerning scientific hypotheses is false?

• they must be testable by experimentation

• they are not always correct

• they are the same as theories

• they are constructed based on observations

Tags

NGSS.MS-PS3-5