ACT 100 - EC-6 Science Practice: Category 4

Cattle egrets are birds that live near cattle because as the cattle graze, insects in the ground are stirred up to the surface. When the insects are stirred to the surface, the birds eat the insects. The cattle are unaffected by the birds or the insects. This relationship between the cattle egrets and the cattle can best be described as:

• parasitism

• commensalism

• mutualism

• predation

Red flowers are dominant over white flowers in roses. A heterozygous red flowering rose is mated with a purebred, white colored rose. What percentage of their offspring will have the genotype rr?

• 100%

• 25%

• 75%

• 50%

Tags

NGSS.MS-LS3-2

Which organelle is responsible for breaking down glucose into energy for the cell?

• mitochondrion

• ribosome

• nucleus

• chloroplast

Tags

NGSS.MS-LS1-2

Which of the following would not be characterized as an adaptation to warmer than average global temperatures in recent decades?

• trees dropping leaves in winter

• improved heat tolerance in corals

• plants adjusting their flowering times

• delayed loss of summer coats in animals

Tags

NGSS.MS-LS4-4

NGSS.MS-LS1-5

A population of lizards, some with green coloring and some with brown coloring, is introduced into a field that is mostly dirt. A few generations later, the majority of the lizards have brown coloring. Which of the following best explains this change?

• Green colored lizards dehydrate and die faster

• Brown colored lizards can run faster

• Brown colored lizards are better able to hide from their predators

• Green colored lizards have more offspring

Tags

NGSS.MS-LS2-4

NGSS.MS-LS4-4

Which of the following systems in the human body functions as the system responsible for transporting food and water waste?

• digestive system

• immune system

• circulatory system

• endocrine system

Which of the following is a reactant of the photosynthesis reaction?

• glucose

• oxygen

• carbon dioxide

• starch

Tags

NGSS.MS-LS1-6

Which of the following interventions would be most beneficial for a visual learner who is struggling to differentiate between DNA and RNA?

• Ask the student to build a model of the DNA molecule and label the parts that would be different in an RNA molecule

• Ask the student to compose a song about the differences between DNA and RNA molecules

• Ask the student to watch a documentary over the discovery of the DNA molecule

• Ask the student to color a picture of the DNA molecule and RNA molecule. Ask the student to highlight the difference.

A forest was cleared and turned into a field of organic soybean plants. Which of the following most likely occurred?

• The number of plant species increased

• The number of insect species increased

• The number of insect species decreased

• The variety of plants and animals both increased

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-2

The life cycle of a mosquito is shown here. Mosquitoes begin as an egg, then develop into a larva, then pupa, and finally adult. According to this diagram, what kind of development do mosquitoes have?

• complete metamorphosis

• incomplete dominance

• incomplete metamorphosis

• complete dominance