• they were produced by asexual cloning

• some of the puppies have genetic material from only one of the parents

• each puppy has a different combination of genetic material as a result of sexual reproduction

• all the puppies developed from the same fertilized egg

Tags

NGSS.MS-LS3-2

Sodium and lithium have similar chemical properties. What characteristic of these elements explains why they are chemically similar?

• Their atoms both have one valence electron.

• Their atoms both have more neutrons than protons.

• Their atoms have the same number of energy levels.

• Their atoms contain equal numbers of protons and electrons.

Tags

NGSS.MS-PS1-1

• Location W, because location W has the gentlest slope

• Location X, because location X is near the bottom of a slope

• Location Y, because location Y has the steepest slope

• Location Z, because location Z is the flattest slope

Tags

NGSS.MS-ESS2-2

• Diptera

• Isoptera

• Ephemeroptera

• Zoraptera

• Both particles X and Y have a positive charge. Particle Z has a negative charge.

• Both particles X and Y have a negative charge. Particle Z has a positive charge.

• Either particle X or particle Y has a positive charge. Particle Z has a negative charge.

• Either particle X or particle Y has a negative charge. Particle Z has a positive charge.

Tags

NGSS.MS-PS1-1

• Action: The force of the bird on the wires Reaction: The force of the wires on the fence post

• Action: The force of the wires on the fence post Reaction: The force of the fence post on the bird

• Action: The force of the fence post on the bird Reaction: The force of the bird on the wires

• Action: The force of the bird on the fence post Reaction: The force of the fence post on the bird

Tags

NGSS.MS-PS2-1

NGSS.MS-PS2-2

Farmers can best reduce negative effects on the water quality of nearby streams and lakes by planting crops that —

• produce less oxygen

• produce less carbon dioxide

• need less fertilizer

• need less solar energy

Tags

NGSS.MS-ESS3-3

Buffelgrass is an invasive species of grass from Africa that outcompetes native Texas grasses for space and water. Which long-term change to a Texas grassland would most likely occur due to the introduction of buffelgrass?

• The population of native grasses will increase.

• The population of native grasses will decrease.

• Buffelgrass offspring will develop traits like those of native grasses.

• Buffelgrass offspring will develop traits like those of other invasive species.

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-4

• Student 1 traveled 40 m, and student 2 traveled 20 m.

• Student 1 traveled 50 m, and student 2 traveled 30 m.

• Student 1 traveled 60 m, and student 2 traveled 30 m.

• Student 1 traveled 70 m, and student 2 traveled 25 m.

• Main sequence

• White dwarf

• Blue giant

• Red giant

Tags

NGSS.HS-ESS1-3