Insecticides are used to control insect populations so that they don't destroy crops. Over time, some insecticides become less effective at killing insects, and new insecticides must be developed. What is the most likely reason insecticides become less effective over time?

• Surviving insects have learned to include insecticides as a food source. 
• Surviving insects pass their resistance to insecticides to their offspring.
• Insecticides build up in the soil. 
• Insecticides are concentrated at the bottom of the food chain. 

Tags

NGSS.MS-LS3-1

NGSS.MS-LS4-4

Sugars are _______ composed of _______ which are made up of ________. 

• molecules, atoms, compounds
• atoms, compounds, molecules
• molecules, compounds, atoms
• compounds, molecules, atoms

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

Sunscreen is used to protect the skin from exposure to which type of solar radiation?

• visible
• X-rays
• infrared
• ultraviolet

Tags

NGSS.HS-PS4-4

When male wolves place their scent on trees, they are most likely doing this in order to ________.

• attract female wolves
• attract prey
• mark their territory against other wolves
• mark the location of food supplies

If both parents are heterozygous dominant for having brown eyes, what is the probability that one their children is going to have blue  eyes? Assume that blue eyes (bb) is recessive, and brown eyes (BB) is dominant.

• 75%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-3

What is the primary function of the large leaves found on seedlings growing in a forest?

• To provide shade for the root systems
• To get rid of excess water that is entering through the roots
• To allow for leaf damage by insects
• To gather as much light as possible for photosynthesis.

Tags

NGSS.MS-LS1-6

Which one of the following characteristics is most likely to be found in mammals that are preyed on by other mammals for food?

• Eyes on the sides of the head
• Teeth that are long and pointed
• Claws on the feet
• Ears that cannot move

Tags

NGSS.MS-LS4-4

What is the difference between primary and secondary succession?

• Primary succession doesn't start with bare rock but secondary does.
• Primary succession doesn't start with lichens but secondary does.
• Primary succession starts with trees, but secondary doesn't. 
• Primary succession starts with bare rock, but secondary doesn't.

Fill in the blanks in the correct order as it should appear. 
Domain, Kingdom, ________, Class, Order, _________, Genus, Species

• Phylum, Family
• Family, Genus
• Family, Species, 
• Phylum, Class

Because mosses and liverworts lack a vascular system, they usually live in places that are always _________. 

• hot
• dry
• cold
• wet

Tags

NGSS.MS-LS1-5