I. An adaptation
II. It is genetic change
III. Due to the help nature of the mutation, it is
passed down from one generation to the
next
IV. Mutation is inherited and so becomes an adaptation
A. I and II only
B. II and III only
C. I, II and III only
D. I, II, III and IV
Ans: An adaptation is a mutation, or genetic change, that
helps an organism such as a plant or animal, survives in its environment. Due
to the helpful nature of the mutation, it is passed down from one generation to
the next. As more organism inherit the mutation becomes a typical part of the
species. The mutation has become an adaptation.
2. Which of the following is NOT an example of
behavioral adaptation?
A. Fur on a beer
B. Migration of birds
C. Opposum playing dead
D. Rabbit freezing when it thinks is has been seen.
Ans: A. Fur on a beer
-All organism have adaptation that help them survive and
thrive. Some adaptation are structural. Structural adaptations are physical
features of an organism like bill on a bird or the fur on a bear. Other
adaptations are behavioral. Behavioral adaptation are the things organism do to
survive. For example, bird calls and migration, opossum plays dead and rabbit
freezes when seen are behavioral adaptations
3. A chameleon changing colors to blend in with its
surroundings is an example of__________.
A. camouflage
B. extinction
C. Hibernation
D. migration
Ans: A camouflage
- Chameleons are capable of changing color. These colors
changes assist the reptile to camouflage itself in the presence of potential
predators. Chameleons tend to move very slowly. They remain perfectly still
into the surroundings vegetation, making it hard for predators to spot them.
Color changes also help the chameleon regulate its body temperature,a s darker
body colors absorb heat and lighter colors reflect and thus repel heat.
4. Which process do some animals undergo when they go
into a deep winter sleep and so body activities slowdown and can live off store
food?
A. camouflage
B. extinction
C. Hibernation
D. migration
Ans: C. Hibernation
- Groundhogs also called woodchucks, spend the warner
months eating to build up the fat layers to survive a winter in hibernation.
Hibernation is a deep sleep that helps them to save energy and survive the
winter without eating much. During hibernation the animas body temperature
drops and its heartbeat and its breathing slowdown so that is does not use much
energy.
5. Which adaptation is employed by a viceroy butterfly
when it copies the monarch butterfly so that it does not get eaten?
A. Camouflage
B. Mimicry
C. Play dead
D. Venom
Ans: B. Mimicry
- Mimicry comes in several varieties, including Batesian
mimicry, which is when palatable organism mimics a species that is unpalatable
to predators. Consequently, they are avoided by predators increasing their
fitness. A vivid example of Batesian mimicry is depicted by Viceroy and
monarch Butterflies. Monarch Butterflies
are unpalatable due to toxic milkweeds they consumes as larvae, which results
in low levels of predation in their natural environment.
6. There is unity in diversity in the study of biology.
Which statement explains this?
A. All the living beings have structures unique to each
B. Living beings have structured unique to each
C. No living being can live alone
D. Living things need one another
Ans: A. All the living beings have structures unique to
each
- The meaning of unity in diversity is the existence of
oneness even after various differences, As diverse as life is, it also displays
remarkable unity there are genetic similarities within the DNA o organism as
different as bacteria and animals. Unity is also evident in many features of
cell structure.
7. Which explains/s complementary of structure and
function?
I. Function always reflects structure
II. The physiology of a body parts is determined by its
anatomy
III. The function of a body part depends on its structure
A. I, II and III
B. I and II
C. II and III
D. I and III
Ans: A. I, II and III
- The principle of complementarity of structure and
function states that function is dependent on structure and that the form of a
structure relates to its function.
8. The sharp incisors (The teeth in front) can tear
food; while the molars (the flat teeth in back) can grind food into tiny
pieces. The molars are also closest to the higher of the Jaw so that’s where
chewing can occur with the most force especially useful for grinding up
harder-to-digest plant foods. What does this proves ?
A. Function is dependent on structure.
B. Structure does not relate to its function
C. Structure and functions evolve
D. Structure and function are poles apart.
Ans: A. Function is dependent on structure.
- The principle of complementarity of structure and
function states that function is dependent on structure and that the form of a
structure relates to its function. Bone are strong and contain hard mineral
deposits so they can support the body.
9. Which of the following is TRUE?
A. A molecule consist of two or more atoms of the same different elements
B. Molecules fuse together to form atoms which come together
to form electrons
C. Electrons and protons combine to form molecules, which
come together to form atoms
D. Protons are the fundamental structural units of
elements and each proton retains all the properties of its element
Ans: A. A molecule consist of two or more atoms of the same different elements
- A molecule is composed of two or more atoms of the same
or different elements, held together by interactions among their outermost
electron shells. Meanwhile an atom has subatomic particles which include
protons, neutrons and electrons
10. Which of the following is NOT an important electrolyte in the body?
A. Carbon ions
B. Chloride ions
C. Potassium ions
D. Sodium ions
Ans: Electroare elecritcally-charged minerals the body
require for regulating water levels blood acidity and muscle function. The most
common electrolytes are sodium, potassium and chloride; other electrolytes
include calcium, magnesium and phosphorus. Sodium positive in the body
determines the volume of extracellular fluid
in circulation, making it ciritcal for maintaining blood pressure.
Chloride , a negatively charge ion, influences neural activity and muscle
function. Potassium plays a vital role in cellular and electrical
functions in the body.
11. What is an atomic mass?
A. It is sum of electrons and protons
B. It is sum of electrons and neutrons
C. It is the total number of protons and neutrons
D. It is difference in the number of protons and neutrons
Ans: C. It is the total number of protons and neutrons
- The atomic mass of an element is the total number of
protons and neutrons. It is the measure of the atom’s size and has a key role
in the chemical properties of the elements. Although number is the number of
protons in the nucleus.
12. Glucose is the carbohydrate and is considered to be
the most important simple sugar in human metabolism. It has a chemical formula
of C₆
H₁₂
O₆.
What does this mean?
A. It contains 6 atoms of carbon 12 atoms and oxygen and
12 protons of hydrogen.
B. It contains 6 atoms of carbon 12 atoms of hydrogen and
6 atoms of oxygen
C. It contains 6 molecules of carbon 12 molecules of
hydrogen and 6 molecules or oxygen
D. The atomic mass of hydrogen is equal to the sum of the
atomic masses of carbon and oxygen
Ans: B. It contains 6 atoms of carbon 12 atoms of
hydrogen and 6 atoms of oxygen
- Glucose is a simpler sugar. It is a compound with a
molecular formula of C₆ H₁₂ O₆. Since it is a compound, it is describes in terms of its
constituent atoms.
13. How many atoms of each
elements are there in 2 AI₂ (SO₄)₃?
A. 2 atoms of aluminum, 3 atoms
of sulfur and 7 atoms of oxygen
B. 4 atoms of aluminum. 3 atoms
of sulfur and 7 atoms of oxygen
C. 4 atoms of aluminum, 3 atoms of sulfur and
12 atoms of oxygen
D. 4 atoms of aluminum. 6 atoms of sulfur and 24 atoms of
oxygen
Ans: D. 4 atoms of aluminum. 6 atoms of sulfur and 24
atoms of oxygen
-(SO₄)₃ would mean that there are three (1x3=3) sulfur atoms and
twelve (4x3=12) oxygen atoms. The coefficient of 2 in front indicates that
there are two AI₂ (SO₄)₃ molecules. Therefore, in total, there are four aluminum
atoms, six sulfur atoms and 24 oxygen atoms.
14. In the chemical equation AgNo₃ + NaCI →
AgCI ↓+
NaNO3, what does ↓ mean?
A. This is an aqueous solution
B. Gas evolves
C. Heat is supplied
D. Precipitate is formed
Ans: D. Precipitate is
formed
-The symbol (aq) means acqueous. Means heat is supplied means evolution of gas means formation of
precipitate.
15. Where can you find the non-metals in the periodic
table?
A. Bottom part
B. left side
C. Middle portion
D. Right side
Ans: D. Right side
- Metals are usually found at the left side up to the middle
part of the periodic table. Elements on the right side are classified as
non-metals. Metalloids are the elements in between metals and non-metals.
16. Oxygen, an important gas in respiration, belongs to
Group VI-A in the periodic table does thenumber in the group indicate?
A. Energy level
B. Number of protons
C. Oxidation number
D. Valence electrons
Ans: D. Valence electrons
- Group is the
column in the periodic table. The elements in each group have the same number
of electrons in the outer orbital. Those outer electrons are known as valence
electrons. They are the electrons participating in chemical bonding.
17. How is the modern periodic table arranged?
A. Increasing atomic mass
B. Based on the year discovered
C. Increasing atomic number
D. Decreasing electronegativity
Ans: A. Increasing atomic mass
- The periodic table is a tabular arrangement of elements
based on increasing atomic number. The modern periodic law states that the
properties of elements and their compounds are a periodic function of their
atomic numbers.
18. Which of the chemical bond plays a key role in
shaping tertiary and quaternary proteins in determining shapes of chromosomes
and in muscle contraction?
A. Covalent
B. Hydrogen
C. Ionic
D. Polar covalent
Ans: C. Ionic
- Ionic bonds are commonly found in dry forms such as
salts are found in compounds throughout the body. Ionic bonds play a major in
shaping tertiary and quaternary proteins in determining the shapes of chromosomes
depending on what atoms bond to each other, in cell signaling and in muscle
contraction. Most biological molecules employ covalent bonding. Monosaccharides
such as glucose, fructose and galactose are held together amino acids in chain
creating peptides. The double strands of DNA are held together by hydrogen
bonds.
19. Which chemical bonding is involved in the formation
of water?
A. Covalent
B. Hydrogen
C. Ionic
D. Polar covalent
Ans: D. Polar covalent
- In water, an electron is shared between each hydrogen
atom and the central oxygen atom. The oxygen atom attracts the electron a
little more strongly than hydrogen does this means. That the shared electrons
spend more time at the oxygen end of the molecule slightly negative. Since the
electrons are not near the hydrogen end as much that end is slightly positive.
When a covalently bonded molecule has more electrons in one area than another,
it is called a polar molecule. Water is an example of a polar molecule.
20. The molecule structure of carbon dioxide is ö =
c = ö.
What doe this tell you?
A. It is formed through ionic bonding
B. It has a stronger bond compared to carbon monoxide
C. It is composed of two atoms of oxygen have double bond each
between their atoms
D. Carbon and oxygen have doubled bond each between their atoms
Ans: D. Carbon and oxygen have doubled bond each between their
atoms
-The Octet Rule requires
all atoms in a molecule to have 8 valence electrons either sharing losing or
gaining electrons to become stable. Carbon dioxde has a total of 1 carbon atom
and 2 oxygen atoms. Each oxygen atom has 6 valence electrons whereas the carbon
atom only has 4 valence electrons. Satisfy the Octet Rule, carbon needs 4 more
valence electrons. Since each oxygen atom has 3 lone pairs of electrons, they
can each share 1 pair of electrons with carbon; as a result, filling carbon’s
outer valence shell thereby satisfying the Octet Rule. The molecular structure
of the result shows a double bond. A double bond is when two atoms share two
pairs od electron with each other. The double bond is depicted conventionally
by two joining the atoms. Each line represents one pair of shared electrons.
This type of bond is much stronger than a single bond, but less stable.
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