You would expect a high concentration of mitochondria in heart cells. Heart cells, or cardiomyocytes, require a significant amount of energy to maintain their continuous contractions and support the heart's pumping action, which is why they have a high number of mitochondria to produce ATP (adenosine triphosphate) through aerobic respiration.
Consider the process that occurs in mitochondria. In what type of cells would you expect a high concentration of mitochondria?(1 point)
Responses
blood cells
blood cells
nerve cells
nerve cells
skin cells
skin cells
heart cells
11 answers
If eukaryotes all came about due to endosymbiosis, what would result from that?(1 point)
Responses
preserved DNA from the original ancestor that remains unchanged
preserved DNA from the original ancestor that remains unchanged
similar structures in eukaryotes with slight variations depending on their use
similar structures in eukaryotes with slight variations depending on their use
every organism would have the same set of body systems and functions
every organism would have the same set of body systems and functions
ancient prokaryotes living inside of modern eukaryotes
Responses
preserved DNA from the original ancestor that remains unchanged
preserved DNA from the original ancestor that remains unchanged
similar structures in eukaryotes with slight variations depending on their use
similar structures in eukaryotes with slight variations depending on their use
every organism would have the same set of body systems and functions
every organism would have the same set of body systems and functions
ancient prokaryotes living inside of modern eukaryotes
The result of the endosymbiotic theory, which suggests that eukaryotes originated from a symbiotic relationship between ancient prokaryotes, would be ancient prokaryotes living inside of modern eukaryotes. Specifically, this theory explains that certain organelles, such as mitochondria and chloroplasts, originated from free-living prokaryotic organisms that were engulfed by ancestral eukaryotic cells.
Which type of microscope allows us to see organic specimens at the atomic level?(1 point)
Responses
atomic force
atomic force
fluorescence microscope
fluorescence microscope
scanning tunneling microscope
scanning tunneling microscope
light-based microscope
Responses
atomic force
atomic force
fluorescence microscope
fluorescence microscope
scanning tunneling microscope
scanning tunneling microscope
light-based microscope
The type of microscope that allows us to see organic specimens at the atomic level is the scanning tunneling microscope. This microscope can achieve atomic-scale resolution and is capable of imaging surfaces at the atomic level by measuring the tunneling current from a sharp tip as it scans across a conducting surface.
What is the unique function of central vacuoles in a plant cell?(1 point)
Responses
they store enzymes
they store enzymes
they store water
they store water
they store pigments
they store pigments
they store ribosomes
Responses
they store enzymes
they store enzymes
they store water
they store water
they store pigments
they store pigments
they store ribosomes
The unique function of central vacuoles in a plant cell is that they store water. Central vacuoles are crucial for maintaining turgor pressure within plant cells, which helps keep the plant upright and supports its structure. Additionally, they can also store various substances, including ions, nutrients, and waste products, but water storage is a primary function.
Neurotransmitter release is an example of ________.(1 point)
Responses
cellular miscommunication
cellular miscommunication
cyclical behavior
cyclical behavior
autocrine signaling
autocrine signaling
paracrine signaling
Responses
cellular miscommunication
cellular miscommunication
cyclical behavior
cyclical behavior
autocrine signaling
autocrine signaling
paracrine signaling
Neurotransmitter release is an example of paracrine signaling. In this type of signaling, neurotransmitters released from one neuron act on nearby target cells, such as other neurons or muscle cells, to transmit signals over short distances.
How are new viruses made?(1 point)
Responses
viral DNA or RNA copied in a host cell
viral DNA or RNA copied in a host cell
viral DNA or RNA copied in a virus
viral DNA or RNA copied in a virus
sexual reproduction
sexual reproduction
asexual reproduction
Responses
viral DNA or RNA copied in a host cell
viral DNA or RNA copied in a host cell
viral DNA or RNA copied in a virus
viral DNA or RNA copied in a virus
sexual reproduction
sexual reproduction
asexual reproduction
New viruses are made by viral DNA or RNA copied in a host cell. Viruses require a host cell to replicate and produce new viral particles, utilizing the host's cellular machinery for replication and assembly of new virions.
11 answers