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Worksheets

Science Study Guide Exam 3

Total questions: 100

Worksheet time: 50mins

Name
Class
Date
1.

Why is this mechanism not wasteful? Wouldn’t it be better just to produce enough gametes to ensure continuity of the species?

a)

No, producing many gametes increases the chances of successful fertilization and genetic diversity.

b)

Yes, producing fewer gametes is always more efficient for species survival.

c)

No, producing more gametes decreases the chances of genetic variation.

d)

Yes, producing only enough gametes ensures all offspring survive.

2.

Cite at least three other examples of ORP and briefly discuss why this idea is not considered a “strict biological law.”

a)

Examples of ORP include sickle cell anemia, lactose tolerance, and cystic fibrosis; it is not a strict biological law because exceptions exist due to environmental and genetic factors.

b)

Examples of ORP include photosynthesis, mitosis, and meiosis; it is not a strict biological law because it always applies.

c)

Examples of ORP include gravity, inertia, and thermodynamics; it is not a strict biological law because it is a physical law.

d)

Examples of ORP include osmosis, diffusion, and active transport; it is not a strict biological law because it only applies to plants.

3.

Which of the following are characteristics that can be used to reconstruct animal phylogeny without including molecular genetic analysis?

a)

Body symmetry, presence of tissues, type of body cavity

b)

DNA sequence similarities, gene expression patterns, protein structure

c)

Chlorophyll content, photosynthetic rate, root structure

d)

Number of chromosomes, nucleotide composition, codon usage

4.

The function of leghemoglobin in the roots of legumes is to:

a)

bind oxygen to protect nitrogenase during nitrogen fixation

b)

transport sugars from leaves to roots

c)

absorb water and minerals from the soil

d)

provide structural support to root nodules

5.

Which of the following represents the change in chromosome number during the process of fertilization in most animals and plants?

a)

Sperm (n chromosomes) + Ovum (unfertilized egg, n chromosomes) → zygote (2n chromosomes) → multiple subsequent mitosis

b)

Sperm (n chromosomes) + Ovum (unfertilized egg, n chromosomes) → zygote (2n chromosomes) → a single event of meiosis

c)

Zygote (2n chromosomes) → Sperm (n chromosomes) + Ovum (unfertilized egg, n chromosomes) → multiple subsequent mitosis

d)

None of the above

6.

In class, we discussed the diagnosis of the Kingdom Animalia (as described by the Encyclopædia Britannica: Animals are multicellular eukaryotes whose cells are bound together by collagen. They have sperm and form polar bodies in oogenesis. Animals lack semirigid cell walls, and movement is effected through muscle and nerve cells. They usually gain energy from other organisms or their products. Animals are found almost anywhere on Earth where there is life. Let's interpret some aspects of this diagnosis by finding the incorrect conclusion:

a)

A) Animals are mostly dioecious

b)

B) Besides being able to move, animals can be distinguished from other eukaryotic organisms by the absence of cell walls.

c)

C) Nerve cells transmit orders from the central or the peripheral nervous system to muscles, thus allowing the animal to move.

d)

D) Besides collagen, some animal cells are also bound by carbohydrates on glycoproteins.

e)

E) Animals are heterotrophs.

7.

Consider this diagram of the process of gastrulation and answer the questions below: The arrows A and B represent the movement of cells from the animal pole and rapid division forming

a)

the gastrula.

b)

a bilayered gastrula (A).

c)

a trilayered gastrula (B).

d)

All of these options are correct.

e)

None of the above are correct.

8.

What do the arrows A and B represent?

a)

ectoderm.

b)

protoderm.

c)

mesoderm.

d)

endoderm.

e)

None of the above

9.

The embryonic germ layer of tissue in animals that develops into skin and nervous system is the

a)

ectoderm.

b)

protoderm.

c)

mesoderm.

d)

endoderm.

e)

None of the above

10.

The embryonic germ layer of tissue in animals that develops into the digestive tract, and organs derived from the digestive tract, is the

a)

ectoderm.

b)

protoderm.

c)

mesoderm.

d)

endoderm.

e)

None of the above

11.

The embryonic germ layer of tissue in animals that develops into the muscles and reproductive system is the

a)

ectoderm.

b)

protoderm.

c)

mesoderm.

d)

endoderm.

e)

None of the above

12.

What is the difference between animals that exhibit radial versus bilateral symmetry?

a)

Animals with radial symmetry show cephalization, whereas those with bilateral symmetry do not.

b)

Radial symmetry only occurs in round organisms like the sponges, whereas bilateral symmetry is common to all of the more complex animals.

c)

Mirrored arrangement of body components is common with radial symmetry, but not found at all in bilateral symmetry.

d)

Radial symmetry is characterized by the animal having a coelom, whereas bilateral symmetry has no coelom in the animal body.

e)

Body components are arranged around a central axis in radial symmetry but are arranged with a distinct left and right in bilateral symmetry.

13.

Sponges do not have organized tissues and organs. They cannot be classified as having bilateral or radial symmetry. Therefore, sponges are classified as _______ whereas the rest of the animal groups (with tissues), which are called _________.

a)

Eumetazoa, Parazoa

b)

Parazoa, Metazoa

c)

prokaryotes, eukaryotes

d)

Antizoa, Telozoa

e)

None of the above

14.

A fluid-filled body cavity that forms completely within the mesoderm of animals is a

a)

protostome.

b)

deuterostome.

c)

coelom.

d)

gastrula.

e)

blastula.

15.

What is the name of the coelom in an eucoelomate organism, such as mammal?

a)

peritoneal cavity

b)

pericardium

c)

true body cavity

d)

cardiopulmonary system

e)

None of the above

16.

Which of the following does not have a true coelom?

a)

insect

b)

snail

c)

sea star

d)

roundworm

e)

earthworm

17.

Sponges belong to the phylum

a)

Chordata.

b)

Platyhelminthes.

c)

Cnidaria.

d)

Porifera.

e)

Echinodermata.

18.

Corals and jellyfish belong to the phylum containing the

a)

sponges.

b)

flatworms.

c)

cnidarians.

d)

nematodes.

e)

annelids.

19.

Flukes and tapeworms belong to the phylum containing the

a)

cnidarians.

b)

sponges.

c)

flatworms.

d)

nematodes.

e)

annelids.

20.

All of these animals are mollusks except

a)

flatworms.

b)

squids and octopuses.

c)

chitons.

d)

terrestrial snails and slugs.

e)

scallops.

21.

A mollusk that has arms connecting directly to the head of the animal is a cephalopod.

a)

True

b)

False

22.

Leeches and earthworms belong to the Phylum

a)

Echinodermata.

b)

Arthropoda.

c)

Annelida.

d)

Cnidaria.

e)

Mollusca.

23.

Which of the following is not a characteristic of nematodes?

a)

They have a complete digestive tract.

b)

They have bilateral symmetry.

c)

They exhibit cephalization.

d)

They are unsegmented.

e)

They have a coelom.

24.

Spiders, lobsters, mosquitoes, and scorpions belong to the Phylum

a)

Echinodermata.

b)

Arthropoda.

c)

Annelida.

d)

Cnidaria.

e)

Mollusca.

25.

The most successful phylum regarding diversity and number of species is

a)

Platyhelminthes.

b)

Nematoda.

c)

Mollusca.

d)

Arthropoda.

e)

Echinodermata.

26.

Sea cucumbers, star fishes, dollar sands, and sea urchins belong to the phylum

a)

Nematoda.

b)

Echinodermata.

c)

Arthropoda.

d)

Cnidaria.

e)

Mollusca.

27.

Which of the following is not a characteristic of echinoderms?

a)

They have radial symmetry in adults.

b)

They exhibit cephalization.

c)

They have bilateral symmetry in larvae.

d)

They have a complete digestive tract.

e)

They have spiny skin.

28.

In a biology lab you are given a lancelet to dissect. During the dissection you observe a flexible rod extending along its back to its tail. Based on this observation, you can place it in the phylum

a)

Echinodermata.

b)

Arthropoda.

c)

Nematoda.

d)

Chordata.

e)

Cnidaria.

29.

The function of vertebrae is to

a)

protect the brain and nerve cord.

b)

protect the nerve cord and provide attachment points for muscles.

c)

provide attachment points for muscles.

d)

protect the brain.

e)

protect the nerve chord.

30.

An animal that maintains its body temperature by using heat generated from its own metabolism is a(n)

a)

thermophile.

b)

ectotherm.

c)

endotherm.

d)

poikilotherm.

e)

mesophile.

31.

A description of sharks that does not apply to other fish groups is that

a)

they are cartilaginous craniates without jaws.

b)

they have scaleless skin with lateral lines for sensing vibrations.

c)

they are bony with lobe-finned appendages.

d)

they are bony, with ray-finned appendages.

e)

they are cartilaginous craniates with jaws.

32.

Which of the following is an amphibian?

a)

turtle

b)

octopus

c)

coelacanth

d)

lizard

e)

toad

33.

Which of the following is not an example of a mammal?

a)

dolphin

b)

kangaroo

c)

platypus

d)

penguin

e)

whale

34.

Mammals that lay eggs are

a)

monotremes.

b)

marsupials.

c)

placentals.

d)

bats.

e)

birds.

35.

Which of the following is not a characteristic of mammals?

a)

They are endothermic.

b)

They have lungs.

c)

They have an amnion.

d)

They have a two-chambered heart.

e)

They have a skeletal system composed of bone.

36.

The octopus and squid are cephalopods and are members of which group?

a)

Arthropods

b)

Echinoderms

c)

Cnidarians

d)

Mollusks

e)

Amphibians

37.

Use the following information to answer the next five questions: In most species, the female frogs lay their ova (unfertilized eggs) directly in the water as males clasp their back and releases sperm. The fertilized eggs hatch into legless, aquatic tadpoles. Most tadpoles feed on algae and have gills. As they mature, tadpoles develop legs and lungs, lose the tail, and acquire carnivorous tastes. Frogs are in which group?

a)

reptiles

b)

fishes

c)

lancelets

d)

amphibians

e)

crocodiles

38.

Use the following information to answer the next five questions: In most species, the female frogs lay their ova (unfertilized eggs) directly in the water as males clasp their back and releases sperm. The fertilized eggs hatch into legless, aquatic tadpoles. Most tadpoles feed on algae and have gills. As they mature, tadpoles develop legs and lungs, lose the tail, and acquire carnivorous tastes. Frogs have which of the following traits?

a)

endothermic

b)

incomplete digestive tract

c)

jawless

d)

larval respiration with gills, but adult respiration with lungs

e)

cartilaginous skeleton

39.

The primary function of external gills in aquatic animals is to

a)

exchange gases with the water.

b)

relay nerve impulses.

c)

secrete reproductive hormones.

d)

defend against invading microorganisms.

e)

transport blood.

40.

Use the following information to answer the next five questions: In most species, the female frogs lay their ova (unfertilized eggs) directly in the water as males clasp their back and releases sperm. The fertilized eggs hatch into legless, aquatic tadpoles. Most tadpoles feed on algae and have gills. As they mature, tadpoles develop legs and lungs, lose the tail, and acquire carnivorous tastes. 40. Frogs have which of the following traits?

a)

incomplete digestive tract

b)

larval respiration with gills, but adult respiration with lungs

c)

cartilaginous skeleton

d)

jawless

e)

endothermic

41.

Some semi-aquatic reptiles like crocodiles and alligators can spend much of their life on dry land. Which of the following is an example of an adaptation that would allow reptiles to live and reproduce on dry land?

a)

internal fertilization

b)

external fertilization and amniotic eggs

c)

external fertilization

d)

internal fertilization and amniotic eggs

e)

amniotic eggs

42.

Caenorhabditis elegans is a nematode that scientists have shown grows from a single cell into about 1,000 cells, of which the same 80 cells die during development through apoptosis. Studying this process in C. elegans has helped scientists identify the genes that regulate programmed cell death processes in humans. Which of the following statements is supported by this observation?

a)

C. elegans infections in humans trigger cell death in the latter.

b)

C. elegans has the same organs that are present in humans.

c)

C. elegans and humans have a common ancestor.

d)

C. elegans give live birth like humans.

e)

C. elegans share about 83% of their genes with humans.

43.

Which of the following is a trait that mammals and reptiles (including birds) share but that is not present in any other chordate group?

a)

lungs

b)

mammary glands

c)

an amnion

d)

legs

e)

hair

44.

The proposed common ancestor to all animals, shown at the left of the evolutionary tree, was a

a)

plant.

b)

protist.

c)

fungus.

d)

bacterium.

e)

None of the above

45.

Prior to the divergence of animals, an ancestor is proposed to have developed the key shared trait of all animals, the

a)

body form of having true tissues.

b)

embryonic development of the mouth first, from embryonic cells.

c)

presence of a mouth by which to consume nutrition materials.

d)

ganglia or brain cells to control all motion.

e)

body form of multicellularity.

46.

A distinguishing animal trait, let's call it "A," that separates the body forms of the Eumetazoa and the Parazoa is

a)

whether it is the mouth or the anus which forms first from the opening in the developing embryo.

b)

whether the animal must periodically molt in order to grow, or has characteristic soft larval stages.

c)

whether the animal has bilateral symmetry and three germ layers, or radial symmetry and two germ layers.

d)

None of the answer choices are correct.

e)

whether or not the animal has true tissues.

47.

If an animal is an invertebrate, this means that it

a)

does not have true tissues.

b)

does not have a complete digestive tract.

c)

has a complete digestive tract.

d)

has a backbone.

e)

does not have a backbone.

48.

If an animal is a vertebrate, this means that it

a)

does not have a backbone.

b)

has a backbone.

c)

does not have true tissues.

d)

has a complete digestive tract.

e)

does not have a complete digestive tract.

49.

The most successful phylum in regard to diversity and number of species is

a)

Mollusca.

b)

Arthropoda.

c)

Echinodermata.

d)

Nematoda.

e)

Platyhelminthes.

50.

A description of sharks that does not apply to other fish groups is that

a)

they are cartilaginous craniates with jaws.

b)

they are cartilaginous craniates without jaws.

c)

they are bony with lobe-finned appendages.

d)

they have scaleless skin with lateral lines for sensing vibrations.

e)

they are bony, with ray-finned appendages.

51.

Mammals that lay eggs are

a)

marsupials.

b)

bats.

c)

monotremes.

d)

birds.

e)

placentals.

52.

The tendency to concentrate sensory organs and brain at the head end of an animal is called cephalization.

a)

True

b)

False

53.

An animal with an indirect development undergoes a metamorphosis in which larvae do not resemble the adult.

a)

True

b)

False

54.

Roundworms, flatworms, and annelids show radial symmetry.

a)

True

b)

False

55.

Find the mismatched pair

a)

Endocrine system—Creates and releases hormones and other molecules into the bloodstream.

b)

Exocrine system—Substances such as sweat, milk, saliva, etc. are excreted onto body surfaces or body cavities.

c)

Paracrine system—Hormones act nearby the gland where they are produced.

d)

All of the above

e)

None of the above

56.

Molecules known as ________, are produced by glands, travel through the bloodstream, and alter the metabolism of specific target cells.

a)

neurotransmitters

b)

enzymes

c)

pheromones

d)

hormones

e)

pectins

57.

Which of the following is(are) not part of the human endocrine system?

a)

testes

b)

thyroid gland

c)

gallbladder

d)

pancreas

e)

ovaries

58.

Which structure(s) would you identify as having the function of making testosterone?

a)

parathyroid gland

b)

pancreas

c)

adrenal gland

d)

pineal gland

e)

testis

59.

The endocrine gland that controls homeostasis in terms of blood glucose levels is the

a)

parathyroid gland

b)

pancreas

c)

adrenal gland

d)

pineal gland

e)

testis

60.

Which hormone deficiency would lead to a female that is not ovulating?

a)

cortisol

b)

calcitonin

c)

testosterone

d)

epinephrine

e)

follicle-stimulating hormone

61.

What gland might be overactive if a patient is losing bone calcium?

a)

testes

b)

adrenal

c)

thyroid

d)

parathyroid

e)

ovaries

62.

The hypothalamus is both part of the central nervous system and part of the endocrine system.

a)

True

b)

False

63.

Peptide hormones

a)

are typically water-soluble and bind to receptors that extend from the plasma membrane of the target cell.

b)

bind to receptors that extend from the plasma membrane of the target cell.

c)

are typically water-soluble and bind to a receptor in the cytoplasm of a target cell.

d)

bind to receptors in the cytoplasm of a target cell.

e)

are typically lipid-soluble and bind to a receptor in the cytoplasm of a target cell.

64.

If you heard of a newly discovered class of steroid hormones, which property would be most surprising?

a)

They are lipid-soluble.

b)

They alter gene expression.

c)

They bind to a receptor on the surface of the cell.

d)

They are chemically closest to testosterone.

e)

They bind to a receptor inside the cell's cytoplasm or nucleus.

65.

Lipid-soluble steroid hormones are synthesized from

a)

cholesterol.

b)

proteins.

c)

carbohydrates.

d)

nucleotides.

e)

amino acids.

66.

All of the glands in the vertebrate endocrine system are regulated by the

a)

cerebrum and medulla oblongata.

b)

cerebellum and pituitary gland.

c)

pineal gland and pituitary gland.

d)

hypothalamus and pons.

e)

hypothalamus and pituitary gland.

67.

Which hormones are primary endocrine products of the ovaries?

a)

follicle-stimulating hormone and testosterone

b)

progesterone and testosterone

c)

estrogen and progesterone

d)

estrogen and follicle-stimulating hormone

e)

melanocortins and melanocorticotropic hormone

68.

The activity of the melanocorticotropic hormone, based on its etymology (melanos = black or dark, cortex = shell, tropos = to turn), is best described as:

a)

Stimulating the production of dark pigment in the skin

b)

Regulating blood sugar levels

c)

Controlling heart rate

d)

Aiding in digestion

69.

Follicle-stimulating hormone (FSH) and luteinizing hormone (LH) are produced by the

a)

hypothalamus.

b)

pineal gland.

c)

anterior pituitary gland.

d)

pancreas.

e)

posterior pituitary gland.

70.

Which of the following has its primary effect on the brain's pain receptors?

a)

adrenocorticotropic hormone (ACTH)

b)

endorphins

c)

antidiuretic hormone (ADH)

d)

follicle-stimulating hormone (FSH) and luteinizing hormone (LH)

e)

oxytocin

71.

In humans, the hormone prolactin is produced by the ________ and targets the ________.

a)

posterior pituitary; kidneys

b)

posterior pituitary; pancreas

c)

anterior pituitary; mammary glands

d)

posterior pituitary; mammary glands

e)

anterior pituitary; pancreas

72.

The hormone oxytocin is produced by the hypothalamus and stored by the posterior pituitary gland, which also releases it into the bloodstream. Oxytocin binds to receptors in the

a)

kidneys and ovaries.

b)

kidneys and mammary glands.

c)

mammary glands and uterus.

d)

pancreas and uterus.

e)

thyroid and adrenal cortex.

73.

The hormone that promotes conservation of water in the human endocrine system is

a)

oxytocin.

b)

thyroid-stimulating hormone (TSH).

c)

luteinizing hormone (LH).

d)

antidiuretic hormone (ADH).

e)

prolactin.

74.

Which of the following hormones is released by the posterior pituitary gland?

a)

follicle-stimulating hormone (FSH)

b)

oxytocin

c)

thyroid-stimulating hormone (TSH)

d)

insulin

e)

None of the above

75.

A person who lives in an area where food is severely deficient in iodine may have a ________, which presents with a swollen thyroid gland.

a)

diabetes

b)

acromegaly

c)

hepatitis

d)

osteoporosis

e)

goiter

76.

To prevent swollen thyroid glands, many nations add iodine to

a)

soda pop.

b)

milk.

c)

orange juice.

d)

processed meats.

e)

salt.

77.

Which of the following would result in elevated heart rate?

a)

hypoparathyroidism

b)

hyperthyroidism

c)

hypothyroidism

d)

hypoadrenalism

e)

hyperparathyroidism

78.

The hormone that stimulates liver cells to release stored glucose is

a)

insulin.

b)

melatonin.

c)

glucagon.

d)

calcitonin.

e)

aldosterone.

79.

The adrenal glands are found at the top of the

a)

thyroid gland.

b)

kidneys.

c)

liver.

d)

ovaries.

e)

pancreas.

80.

People having severe allergic reactions to bee stings and specific foods should carry with them a self-injectable dose of

a)

penicillin.

b)

insulin.

c)

follicle-stimulating hormone (FSH).

d)

epinephrine.

e)

oxytocin.

81.

If an individual has high blood sugar characterized with insulin resistance, they are diagnosed with

a)

Hyperthyroidism.

b)

hypoglycemia.

c)

goiter.

d)

diverticulitis.

e)

type 2 diabetes.

82.

Insulin is a peptide hormone. Which of the following would occur in an intact muscle cell exposed to insulin?

a)

Intracellular second messenger molecule levels would increase.

b)

Intracellular glucose levels would decrease.

c)

It would secrete glucagon.

d)

It would contract.

e)

Intracellular insulin levels would increase.

83.

Another name given to hormones carrying messages from glands to target tissues or organs is

a)

secondary messengers.

b)

primary messengers.

c)

intracellular signal transduction components.

d)

All of the above

e)

None of the above

84.

Intracellular signaling pathways in eukaryotes form a network called

a)

anabolic pathways

b)

catabolic pathways.

c)

intracellular signal transduction.

d)

All of the above

e)

None of the above

85.

Some athletes abuse anabolic steroids to gain greater muscle mass. What are some long-term harmful side effects of using anabolic steroids?

a)

growth of breast tissue

b)

shrunken testicles

c)

infertility

d)

impotence

e)

All of the above are correct.

86.

Neurotransmitters and hormones never share the same target cells.

a)

True

b)

False

87.

The pancreas produces hormones governing blood glucose, the thyroid releases hormones to control metabolism, and the ovaries and testes provide the sex hormones.

a)

True

b)

False

88.

The gallbladder produces materials which help emulsify fats during digestion in addition to digestive enzymes.

a)

True

b)

False

89.

The pineal gland produces oxytocin, which helps regulate sleep.

a)

True

b)

False

90.

The testes produce the male steroid sex hormone called testosterone.

a)

True

b)

False

91.

The pancreas produces both glucagon and insulin to regulate blood glucose levels.

a)

True

b)

False

92.

The adrenal glands secrete hormones that affect body fluid regulation and how the body responds to stress.

a)

True

b)

False

93.

Seasonal affective disorder, in one of its forms, is due to improper melatonin secretion by the pineal gland.

a)

True

b)

False

94.

Darkness tends to increase production of melatonin by the ______ gland.

a)

adrenal

b)

thyroid

c)

pineal

d)

pituitary

e)

mammary

95.

Epinephrine can act as either a neurotransmitter or a hormone, depending on where it is released and where it is targeted.

a)

True

b)

False

96.

The integration of endocrine and nervous functions in the hypothalamus points to how tightly these two systems work together overall.

a)

True

b)

False

97.

Peptide hormones are usually carried in the blood, are water-soluble, and bind to receptors located on the plasma membrane.

a)

True

b)

False

98.

Steroid hormones generally bind to internal receptors rather than to cell-surface receptors.

a)

True

b)

False

99.

Endorphins are natural pain relievers which help block pain.

a)

True

b)

False

100.

Oxytocin, a.k.a. "the love hormone," affects human physiology in many ways, including:

a)

triggering uterine contractions for childbirth.

b)

Milk production during breastfeeding.

c)

Acting as a neurotransmitter to promote social bonding.

d)

All of the above

e)

None of the above