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Life Science Semester Exam 2 Flashcards | StudBud
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Life Science Semester Exam 2
Tt means....
Two identical alleles is....
Life Science Semester Exam 2
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Answers
1
Two identical alleles is....
heterozygous
hybrid
dominant
homozygous
2
Tt means....
pure bred
homozygous
heterozygous
recessive
3
What pigment captures light energy in plants?
vacuoles
centrioles
cytoplasm
chlorophyll
4
Which scientist viewed and named cells?
Robert Hooke
Darwin
Virchow
Mendel
5
Tay sachs, klienfelter's, hemophilia, sickle cell, down's syndrome, albinism, achondroplasia, huntington's are...
genetic disorders
viruses
bacterial diseases
mutations
6
How much genetic information does each parent contribute to the offspring?
25%
100%
0%
50%
7
What is the process that caused the peppered moths to become dark and then light again?
natural selection
homeostasis
metamorphosis
development
8
What is the shape of the DNA molecule?
double helix
curled protein shape
ladder shape
straight line
9
In a pedigree, males are represented with...
a square
a triangle
a straight line
a circle
10
HOW is mitosis different from meiosis?
meiosis makes cells with 1/2 the genetic information
both of these are true
neither of these is true
mitosis is 1 division, meiosis is 2 divisions
11
S = long hair, s = short hair. Ss x ss. How many offspring will have short hair?
2
1
4
0
12
Which of the following is NOT needed for photosynthesis?
carbon dioxide
water
sunlight
oxygen
13
When studying fossils that are in multiple layers of rock, which fossils are the oldest?
the ones that are all in the same layer
the ones in the bottom layer
there is no way to tell without carbon-14 testing
the ones in the top layer
14
How many single chromosomes are in a human gamete?
2
23
1
46
15
A chart that tracks family traits is a ....
pedigree
tree of life
punnett square
cladogram
16
What type of biomolecule is DNA?
protein
lipid
nucleic acid
carbohydrate
17
How many autosome pairs are in a normal human?
44
22
46
23
18
How are photosynthesis and cellular respiration related?
they are opposite equations
all of these are true
they are the same
they do not relate to one another at all
19
The complimentary strand of DNA for TTCGAGG would be...
TTCGAGG
AACGTGG
UUGCTCC
AAGCTCC
20
In which phase of the cell cycle does a cell spend most of its time?
metaphase
mitosis
anaphase
interphase
21
The process by which a cell has the chromosome number cut in half is.....
mitosis
cytokinesis
interphase
meiosis
22
What did Darwin do for the scientific world?
scientific naming
evolution by natural selection
cell theory
genetics
23
When are mutations harmful?
when they help the organism survive
when they increase the variety of the species
when they make survival less likely
when they make the organism eat more food than they have
24
In the base pairs of DNA, cytosine joins with....
uracil
adenine
thymine
guanine
25
A trait that helps an organism survive is...
mutation
variant
disorder
adaptation
26
What does a cladogram show?
evolution of different species
mutations
natural selection
geographic isolation
27
The term for the physical appearance of an allele is....
phenotype
visible trait
demeanor
genotype
28
A gradual change in species over time is...
genetic drift
the fossil record
reproduction
evolution
29
How is meiosis different from mitosis?
meiosis will make 2 cells, mitosis will make 4 cells
mitosis will make 2 cells, meiosis will make 4 cells
both of these are true
neither of these is true
30
Which animals did Darwin study on the Galapagos Islands that led to his theory of evolution by natural selection?
sloths
finches
peppered moths
marine iguanas
31
A 'masked' allele, one that does not show up is...
heterozygous
hybrid
recessive
dominant
32
If a tick has 12 chromosomes in a body cell, how many are in a gamete?
6 - half the number of the body cell
12 - duh
2 - one for the mother and one for the father
1 - each cell has one chromosome
33
Which of the following is NOT needed for photosynthesis?
oxygen
glucose
none of the above are needed
DNA
34
In DNA, one molecule of sugar, one phosphate, and one base make a...
a cell
a nucleotide
protein
strand of DNA
