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Sebum is released in all of the following locations EXCEPT one. Which is the EXCEPTION?

a. Nose

b. Back of hand

c. Palm of hand

d. Eyelid

e. elbow


c. Palm of hand.

Sebum are the oily and waxy products of sebaceous glands, and function to lubricate and waterproof surrounding hair and skin. They are located everywhere EXCEPT the palms of the hands and soles of the feet.


All of the following describe alpha decay EXCEPT one. Which one is the EXCEPTION?


a. Likely for a large nuclei 

b. Reduces mass number

c. Represented by 42He

d. Species loses neutrons

e. Species loses electrons


e. Species loses electrons

Alpha decay occurs when a nucleus emits an alpha particle. Alpha particles are composed of 2 protons and 2 neutrons, making them the same as a He atom. Because the atom's nucleus is giving away to 2 protons and 2 neutrons, the atom's atomic number (# of protons) will decrease by 2 and its mass number (# of protons + neutrons) will decrease by 4. The # of electrons of the species does NOT change in an alpha decay.


Which biome is characterized as the largest biome on Earth with long harsh, snowy winters, short rainy and humid summers and with a landscape dominated by conifers?

a. Deciduous forest

b. Savanna

c. Tundra

d. Taiga

e. Chaparral

d. Taiga

The main extracellular buffer system in humans consists of:

a. amphipathic proteins

b. phosphate

c. sulfate

d. bicarbonate

d. histamines

d. bicarbonate

All of the following were observed by Miller-Urey in their classic experiment to check the hypothesis of the "chemical origins of life" EXCEPT for one. Which one is the EXCEPTION?

a. Methane

b. Amino acids

c. Ammonia

d. Organic compounds

e. Nucleic acids

e. Nucleic acids

Various colors of light were shined on a unique green plant for 24 hours in a closed container and the amount of CO2 present in the container was reduced. The results are below:

Initial amount of CO2: / Final amount of CO2:

Blue light: 10 ppm / 2.3 ppm

Red light: 10 ppm / 1.9 ppm

Green light: 10 ppm / 9.2 ppm

Which of the following conclusions can be drawn form the data?

a. The rate of photosynthesis was highest with red light

b. The rate of photosynthesis was lowest with red light

c. The rate of photosynthesis was highest with green light

d. The rate of photosynthesis was lowest with blue light

e. The rate of photosynthesis was highest with blue light


a. The rate of photosynthesis was highest with red light.

A toxin is released into the body that promotes the degeneration of microfilaments. Which of these structures is most likely to be directly affected?

a. Spindle fibers radiating from centrioles

b. Lysosomes

c. The extracellular matrix

d. Chromosomes

e. Muscle cells

e. Muscle cells: Our muscles are made of long chains of cytoskeleton comprised of two filaments - actin and myosin. Of these, actin is a microfilament while myosin is a motor protein. If actin degenerates, then our muscles would not contract, thus, our answer is (e).

A species of desert plant secretes a chemical into the surrounding soil that kills seeds from any other species of plant that attempts to germinate in that area. What is this an example of?

a. Commensalism

b. Allelopathy

c. Exploitation competition

d. Apparent competition

e. Intraspecific competition

b. Allelopathy - a type of interference competition, where the establishment of individuals who would compete for a mutual resource is prevented, in this case using a toxic chemical.

Which of the following defines notochord?

a. A component that eventually develops into the spinal cord

b. A length of cartilage extending along the body, which will become part of the spinal discs

c. That which become the pharynx, gills, or other feeding system in the animal

d. A muscular tail extending behind the anus

e. A groove located in the underside of the pharynx that produces music in filter-feeding species

b. A length of cartilage extending along the body, which will become part of the spinal discs.

A human embryo is a deuterostome. In deuterostomes, the first opening that forms gives rise to what anatomical structure?

a. Mouth

b. Anus

c. Head

d. Back

e. Genitalia

b. Anus

Which of the following is a method marine fish use to maintain homeostasis?

a. Swim towards freshwater

b. Rarely drink water

c. Absorb salts through gills

d. Constantly urinate

e. Constantly drink water

e. Constantly drink water

In mammals, which of the following structures aides the embryo in the storage of liquid waste?

a. Yolk

b. Amnion

c. Allantois

d. Chorionic Villi

e. Yolk Sac

c. Allantois - the allantois stores wastes, and from part of the umbilical cord to carry waste away from the embryo and towards the mother's blood vessels.

All of the following species are members of the phylum Mollusca EXCEPT one. Which one is the EXCEPTION?

a. clam

b. squid

c. octopus

d. snail

e. lobster


e. lobster

The phylum Mollusca includes: clams, snails, slugs, squids, octopi, cephalopods, and gastropods


3718Ar →3719K +____


What particle completes this reaction?




To answer this question, we must balance the numbers on both sides. The mass number (37) stays the same on both sides of the equation, but the product has a larger atomic number. To balance the equation, we must add an electron to the right side -- this is known as a beta particle, or we can say the compound underwent beta decay. Beta decay is the process that converts a neutron to a proton and an electron

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