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Answers (8)
TA
Answered
You are looking at a structure in the respiratory tract that is filled with small sacs or air pockets. What structure are you looking at?
A) bronchi
B) alveoli
C) larynx
D) pharynx
E) nose
A) bronchi
B) alveoli
C) larynx
D) pharynx
E) nose
On Jul 21, 2024
B
TA
Answered
The central dogma of genetics states that DNA directs protein synthesis and that information flows from
A) protein → RNA → DNA.
B) protein → DNA → RNA.
C) RNA → protein → DNA.
D) RNA → DNA → protein.
E) DNA → RNA → protein.
A) protein → RNA → DNA.
B) protein → DNA → RNA.
C) RNA → protein → DNA.
D) RNA → DNA → protein.
E) DNA → RNA → protein.
On Jul 14, 2024
E
TA
Answered
What is a cross-bridge?
A) A protein found along the groove of the F-actin double helix
B) A T tubule and two adjacent terminal cisternae
C) The combination of myosin heads with active sites on actin molecules
D) The movement of myosin head while attached to actin myofilament
E) After exercise, the O2 taken in that exceeds the O2 required for resting metabolism
A) A protein found along the groove of the F-actin double helix
B) A T tubule and two adjacent terminal cisternae
C) The combination of myosin heads with active sites on actin molecules
D) The movement of myosin head while attached to actin myofilament
E) After exercise, the O2 taken in that exceeds the O2 required for resting metabolism
On Jun 17, 2024
C
TA
Answered
The pectoral region is the
A) area in front of the elbow.
B) chest area.
C) lower back.
D) bottom of foot.
E) forearm.
A) area in front of the elbow.
B) chest area.
C) lower back.
D) bottom of foot.
E) forearm.
On Jun 14, 2024
B
TA
Answered
The thyroid gland secretes which of these hormones?
A) T3, T4, and calcitonin
B) renin and erythropoietin
C) mineralocorticoids, glucocorticoids, and androgens
D) insulin and glucagon
E) estrogen and testosterone
A) T3, T4, and calcitonin
B) renin and erythropoietin
C) mineralocorticoids, glucocorticoids, and androgens
D) insulin and glucagon
E) estrogen and testosterone
On Jun 10, 2024
A
TA
Answered
a flowering plant that produces a polyploid cell that can self-fertilize and produce a new species
A) directional selection
B) sexual dimorphism
C) sympatric speciation
D) balanced polymorphism
E) coevolution
F) allopatric speciation
G) key innovation
H) adaptive radiation
A) directional selection
B) sexual dimorphism
C) sympatric speciation
D) balanced polymorphism
E) coevolution
F) allopatric speciation
G) key innovation
H) adaptive radiation
On May 14, 2024
C
TA
Answered
A rain shadow occurs in the dry lands on the sides of mountains facing the prevailing winds.
On May 11, 2024
False
TA
Answered
Explain why chlorophyll appears green to our eyes.
On May 08, 2024
When the wavelengths of visible light enter the chlorophyll, the pigment molecules will absorb various wavelengths of light while reflecting back others. It is the reflected wavelengths that are interpreted by our brain as various colors. The wavelength spectrum absorbed by chlorophyll includes violet, indigo, blue, and red. The wavelength spectrum that is reflected back includes the greens, which is why we interpret chlorophyll as green.