A student claims that viruses are alive because they have genetic material and can reproduce. Is this student’s claim correct?(1 point)
Responses
Yes, viruses are alive because they can reproduce.
Yes, viruses are alive because they can reproduce.
No, viruses are not alive because they do not have genetic material nor can they reproduce.
No, viruses are not alive because they do not have genetic material nor can they reproduce.
No, viruses are not alive because they rely on a host organism to be able to reproduce.
No, viruses are not alive because they rely on a host organism to be able to reproduce.
Yes, viruses are alive because they have genetic material.
No, viruses are not alive because they rely on a host organism to be able to reproduce.
Of the five characteristics of living things, which one is required for the species to survive but does not have to apply to an individual?(1 point)
Responses
use of energy to function
use of energy to function
response to the environment
response to the environment
growth and change over a life cycle
growth and change over a life cycle
reproduction
reproduction
Plant cells can use energy from the sun to make food. Animal cells cannot. Which organelle is responsible for this difference between plant and animal cells?(1 point)
Responses
central vacuole
central vacuole
cell wall
cell wall
plasma membrane
plasma membrane
chloroplast
chloroplast
chloroplast
Which statement about plasma membranes is correct?(1 point)
Responses
Plant cells have cell walls instead of plasma membranes.
Plant cells have cell walls instead of plasma membranes.
Both plant cells and animal cells have flexible plasma membranes.
Both plant cells and animal cells have flexible plasma membranes.
Animal cells have cell membranes instead of plasma membranes,
Animal cells have cell membranes instead of plasma membranes,
Plant cells have rigid plasma membranes.
Both plant cells and animal cells have flexible plasma membranes.
Which organelle processes sugar?(1 point)
Responses
endoplasmic reticulum
endoplasmic reticulum
mitochondrion
mitochondrion
central vacuole
central vacuole
nucleus
mitochondrion
hat is the function of the plasma membrane? (1 point)
Responses
It helps filter waste inside the cell.
It helps filter waste inside the cell.
It helps plants maintain their shape.
It helps plants maintain their shape.
It helps recognize other cells.
It helps recognize other cells.
It contains hereditary material.
It contains hereditary material.
It helps recognize other cells.
Which statement is correct about the function of a pseudopod? (1 point)
Responses
It helps unicellular organisms move.
It helps unicellular organisms move.
It helps unicellular organisms reproduce.
It helps unicellular organisms reproduce.
It helps multicellular organisms reproduce.
It helps multicellular organisms reproduce.
It helps multicellular organisms move.
It helps unicellular organisms move.
Which function is due to specialized cells found only in plants? (1 point)
Responses
carrying oxygen to other cells
carrying oxygen to other cells
photosynthesis
photosynthesis
digesting food
digesting food
signalling muscles to move
photosynthesis
How are leaf cells and root cells different? (1 point)
Responses
Leaf cells have nuclei, but root cells do not.
Leaf cells have nuclei, but root cells do not.
Leaf cells can reproduce, but root cells cannot.
Leaf cells can reproduce, but root cells cannot.
Leaf cells have chloroplasts, but root cells do not.
Leaf cells have chloroplasts, but root cells do not.
Leaf cells can absorb nutrients from the air, but root cells require soil to absorb nutrients.
Leaf cells can absorb nutrients from the air, but root cells require soil to absorb nutrients.
Chloroplasts play an important role in energy production in plant cells. However, some parts of a plant, like the roots, lack chloroplasts. In one to two sentences, explain the most likely pathway for root cells to obtain energy, and identify the organelles involved.(2 points)
Root cells obtain energy through the process of cellular respiration, which takes place in the mitochondria. They break down stored sugars and convert them into ATP, which provides energy for the cellular processes in the root cells.
n three to five sentences, explain why animal cells do not require a cell wall or a central vacuole for their functions.(
Animal cells do not require a cell wall because they rely on the structural support provided by their cytoskeleton, which is composed of proteins and provides shape and stability to the cell. In addition, animal cells do not have a central vacuole because they do not need to store water or maintain turgor pressure like plant cells. Instead, animal cells have smaller vacuoles or vesicles that perform specific functions such as storage of molecules or transport of materials within the cell. The absence of a cell wall and central vacuole in animal cells allows for greater flexibility and mobility, allowing them to perform various functions such as movement, phagocytosis, and cell-cell communication.
In three to five sentences, compare the process of digesting food in an amoeba (unicellular) to those in a mouse (multicellular) .(4 points)
In an amoeba, the process of digesting food occurs intracellularly within food vacuoles. The amoeba engulfs its food particles through phagocytosis and then releases digestive enzymes into the vacuole to break down the food into smaller molecules. The nutrients are then absorbed into the cytoplasm for energy production and other cellular functions.
On the other hand, in a mouse, the process of digesting food is more complex and occurs in specialized organs of the digestive system, such as the stomach and intestines. The mouse consumes food orally, and it passes through the digestive tract where enzymes and acids are secreted to break down the food into smaller components. Nutrients are then absorbed through the walls of the intestines, and the waste is eliminated through the rectum.
Overall, while both amoebas and mice perform the process of digestion to extract nutrients from food, the mechanisms and complexity differ due to the unicellular nature of amoebas and the multicellular organization of mice.
In three
sentences, compare the process of digesting food in an amoeba (unicellular) to those in a mouse (multicellular) .(4 points)
In an amoeba, digestion occurs within food vacuoles through intracellular processes. The amoeba engulfs its food and releases enzymes into the vacuole to break down the food particles, after which nutrients are absorbed into the cytoplasm.
In a mouse, digestion is a multicellular process that occurs in specialized organs like the stomach and intestines. Food is consumed orally, and enzymes and acids are secreted to break down the food into smaller molecules. Nutrients are then absorbed through the intestinal walls for energy production and other functions in the body.
While both organisms carry out digestion, amoebas rely on intracellular digestion within their single cell, whereas mice utilize specialized organs to facilitate extracellular digestion in a multicellular body.