Living Environment Practice Regents (Shorter)

Question 1

Three human hormones most directly involved in sexual reproduction are

Accepted Answer

estrogen, progesterone, and testosterone

Question 2

The shape of a protein molecule directly determines its

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functions inside and outside of cells

Question 3

The building blocks for this molecule are

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Simple sugars

Question 4

The changes in the fur color are most likely due to

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gene expression due to the differences in abiotic conditions

Question 5

Which sequence of organisms represents a food chain within this food web?

Accepted Answer

sedges --> ants --> frogs --> kookaburras

Question 6

The time shown in the graph is most likely measured in

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years

Question 7

The instructions for the genetic traits of an organism are directly determined by the

Accepted Answer

sequence of bases in DNA molecules

Question 8

Which statement describes the result of this exposure?

Accepted Answer

A new base has been inserted

Question 9

In humans, the placenta is essential to the embryo for

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respiration, nutrition, and excretion

Question 10

A characteristic common to both diffusion and active transport is that

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the movement of molecules occurs

Question 11

In order to reduce the amount of air pollution in Pennsylvania, which change is necessary?

Accepted Answer

Cooperation between the different states must be improved

Question 12

During the process of photosynthesis, energy from the Sun is converted to

Accepted Answer

Chemical energy in the bonds of organic molecules

Question 13

In humans, the maintenance of stable internal temperature is a direct result of

Accepted Answer

detection of and reaction to stimuli in the enviroment

Question 14

DNA replication occurs in preparation for

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both mitosis and meiosis

Question 15

One possible conclusion that can be drawn about the activity of these two cells is that

Accepted Answer

more active transport occurs in cell A than in cell B

Question 16

Within which structure does the placenta normally develop?

Accepted Answer

D

Question 17

The mass of plants shown in the graph refers to the mass of a number of

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populations

Question 18

Nonrenewable resources are

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finite and are depleted over time

Question 19

Which sequence represents structures organized from most complex to least complex?

Accepted Answer

oak tree --> leaf --> guard cell --> chloroplast

Question 20

In the diagram, arrows labeled X and Y represent the use of

Accepted Answer

enzymes

Question 21

The final consumers in many food webs are

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carnivores

Question 22

A process that could be represented by A is

Accepted Answer

Mitosis

Question 23

Government agencies and citizens should propose the use of enviropig in the future only after

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assessing risks, costs, and benefits

Question 24

For a human zygote to become an embryo, it must undergo

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mitotic divisions

Question 25

Before a cell divides, an exact copy of each chromosome is made by the process of

Accepted Answer

Replication

Question 26

A liver cell in this species of squirrel would have

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40 chromosomes

Question 27

The energy in this molecule is stored

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in the bonds between atoms

Question 28

A dead or weekened pathogen used to establish immunity would most likely be found in

Accepted Answer

a vaccine

Question 29

The diagram below represents an activity that occurs in the human body. This diagram best shows

Accepted Answer

Maintenance of homeostasis

Question 30

Which term refers to the ecological niche of many bacteria and fungi in an ecosystem?

Accepted Answer

Decomposer

Question 31

Evolution can occur at different rates; however, for evolution to occur, there must be

Accepted Answer

variations within a species

Question 32

Wombats are classified as herbivores because they can

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get nutrition from the grasses and sedges

Question 33

Based on the information provided in the graph, the process that is occurring is

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Ecological succession

Question 34

Which activity enables humans to produce new genetic combinations in other organisms?

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selecting and breeding the organisms for specific traits

Question 35

One characteristic of all living things is that they

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Maintain internal stability

Question 36

Due to overfishing, the number of fish in the ocean could drastically decrease. This will cause

Accepted Answer

a decrease in the stability of the oceans

Question 37

In order to be accepted, a scientific theory must be

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widely tested and supported by extensive data

Question 38

A direct indication that the white blood cells of the body are functioning would be

Accepted Answer

decrease in the number of pathogens in the body

Question 39

Which phrase describes a human activity that could have a negative effect on this cycle?

Accepted Answer

the continued deforestation and removal of forest resources

Question 40

Which statement is an example of the interdependence of organisms?

Accepted Answer

Ants get food from insect and protect insects from predators

Question 41

Which molecule would require the use of energy in order to be brought into the cell?

Accepted Answer

4

Question 42

Molecules 1 and 2 are most likely

Accepted Answer

carbon dioxide and water

Question 43

Which molecules are needed to cut and copy segments of DNA?

Accepted Answer

Biological catalysts

Question 44

Which population would be most immediately affected by the removal of the lizard population?

Accepted Answer

Ants

Question 45

This process is known as

Accepted Answer

digestion

Question 46

An energy-rich organic compound needed by organisms is

Accepted Answer

glucose

Question 47

Which sequence best represents sexual reproduction?

Accepted Answer

meiosis --> gametes --> fertilization --> zygote

Question 48

A theory of evolution states that

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species change over time, sometimes develop into new species

Question 49

As a result of this process, offspring 1 and offspring 2 will have

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same number of genes and same traits

Question 50

In an appropriately designed experiment, a scientist is able to test the effect of

Accepted Answer

single variable

Living Environment Practice Regents (Shorter)

Questions 50

Living Environment Practice Regents (Shorter)

Questions 50