Life Science

Front 1

In human blood types, type A and type B are codominant over the allele for type O blood. If a female with type O blood and a male with type AB blood have children, which of the following statements is TRUE?

Back 1

C. 50% of their offspring will have type A blood and 50% will have type B blood.

Front 2

A change in genetic material that produces variation within a species is a ....

Back 2

mutation

Front 3

If a human egg cell with 24 chromosomes is fertilized by a sperm cell containing 23 chromosomes, what will be the result? The offspring will

Back 3

inherit a disorder due to the extra chromosome.

Front 4

If the base sequence in DNA is ATCG, the mRNA se‐quence is

Back 4

UAGC

Front 5

An organism is described as 2n = 30. How many chromo‐somes do all somatic cells of this organism contain?

Back 5

15

Front 6

Nondisjunction of sex chromosomes in a human female dur‐ing meiosis may result in her son inheriting the disorder rep‐resented by

Back 6

xxx

Front 7

Environmental factors like ultraviolet light, asbestos fibers, and cigarette smoke are

Back 7

carcinogenic resulting in permanent DNA changes

Front 8

Which of the following genotypes has the potential for the greatest genetic variation in the offspring?

A. Homozygous dominant crossed with homozygous recessive.

B. Heterozygous crossed with homozygous recessive.

C. Homozygous dominant crossed with homozygous dominant.

D. Heterozygous crossed with another heterozygous individual.

Back 8

d?

Front 9

In human polydactylism, having more than five fingers on one hand, is a dominant trait. A man who has five fingers on each hand marries a woman who is polydac‐tyl. The couple has 8 children, only 3 of the children are polydactyl. What is the genotype of mother?

Back 9

Homozygous recessive

Front 10

Which organelle is the site of cellular respiration in both animal AND plant cells?

Back 10

Mitochondria

Front 11

If a parasite invades and irritates the small intestine of an ani‐mal, what effect will it most likely have on the body?

Back 11

Interferes with nutrient absorption.

Front 12

Which of the following lists the structural units of the body from smallest to largest? A. Cell, Tissue, Organ, Organ System, Organism B. Organism, Organ System, Organ, Tissue, Cell C. Tissue, Cell, Organ, Organ System, Organism D. Cell, Organ, Tissue, Organism, Organ System

Back 12

Cell, Tissue, Organ, Organ System, Organism

Front 13

An individual is born with a hole in the septum of their heart between the two atria. Which of the following explain why this condition may be harmful?

Back 13

The cells of the body may not get enough oxygen

Front 14

Which cellstructures aremost directly involved in the produc‐tion and transport of proteins out ofthe cell?

Back 14

Ribosomes and the rough endoplasmic reticulum

Front 15

Trees require several substances for

photosynthesis and growth.

The substance that provides the most

mass for a tree is

Back 15

soil or air

Front 16

The explanation that diseases are caused by microor‐ganism is known as the

Back 16

germ theory

Front 17

Organisms that cause disease are

Back 17

pathogens

Front 18

A lava field is bare forseveral years when lichens begin togrow on the rocks. These are gradually replaced withgrasses, shrubs, and finally trees. This process is called

Back 18

secondary succession

Front 19

You would know that you are located in the Mojave De‐sert if you were surround by

Back 19

joshua trees

Front 20

Which reason BEST explains why temperatures in Nevada are warmer

than areas at the same latitude on the pacific coast of California.

Back 20

As air masses from the west descend into Nevada they begin to gain heat

Front 21

Nevada has a very high biodiversity compared to other states. Which reason below best explains why this is the case.

Back 21

It has numerous ecological ecosystems

Front 22

Which sequence of terms below best illustrates how en‐ergy flows from the sun to an animal cell where it is used for cellular work?

Back 22

Sun → Plants → Sugars → Animal cell → ATP

Front 23

Plants transform energy from the sun into

Back 23

chemical energy.

Front 24

If the decomposers were removed from an ecosystem, what would most likely occur?

Back 24

Essential elements would not be available to plants.

Front 25

Which of the following will most likely provide the best data for determining the phylogeny of three very closely related species?

Back 25

Examining their fossil record

Front 26

Use the diagram below to answer the question that follows. According to the diagram, which two groups of organ‐isms are most closely related? A. Frogs and Salamanders B. Reptiles and Birds C. Birds and Mammals D. Mammals and Reptiles

Back 26

A. Frogs and Salamanders

Front 27

Species with features between hypothesized ancestors and descen‐dant species are known as

Back 27

homologous species.

Front 28

George Cuvier reconstructed fossils that showed organisms in the past differed greatly from organisms in the present. His discovery helped support the theory of

Back 28

evolution.

Front 29

When there are no more living members of a species, that species is said to be

Back 29

extinct

Front 30

The major unifying concept in biology that provides an explanation for the vast diversity of life on our planet is the

Back 30

theory of evolution

Front 31

What term describes the ability of an organism

to survive and reproduce in its environment?

Back 31

fitness

Front 32

An individual in a population that is considered the most fit would

Back 32

live longest

Front 33

Fossils of shellfish and snails are commonly found in the Las Vegas valley.

What can you infer about the environmental

conditions in the Las Vegas valley millions of

years ago? The Las Vegas valley ...

Back 33

once contained a shallow sea.

Front 34

Scientists infer that related species inherited many of the same genes from

Back 34

. a common ancestor.