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A student claims that viruses are alive because they have genetic material and can reproduce. Is this student’s claim correct?

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 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?

growth and change over a life cycle

use of energy to function

reproduction

response to the environment

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?

central vacuole

cell wall

chloroplast

plasma membrane

chloroplast

Which statement about plasma membranes is correct?

Both plant cells and animal cells have flexible plasma membranes.

Plant cells have cell walls 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?

central vacuole

endoplasmic reticulum

mitochondrion

nucleus

mitochondrion

What is the function of the plasma membrane?

It helps plants maintain their shape.

It helps filter waste inside the cell.

It contains hereditary material.

It helps recognize other cells.

The function of the plasma membrane is to help recognize other cells.

Which statement is correct about the function of a pseudopod?


It helps unicellular organisms reproduce.

It helps unicellular organisms move.

It helps multicellular organisms move.

It helps multicellular organisms reproduce.

A pseudopod helps unicellular organisms move.

Which function is due to specialized cells found only in plants?

digesting food

carrying oxygen to other cells

signalling muscles to move

photosynthesis

Photosynthesis

how are leaf cells and root cells different?

Leaf cells have nuclei, 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 reproduce, but root cells cannot.

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.

Root cells obtain energy through aerobic respiration, which takes place in the mitochondria. This process involves the breakdown of organic molecules, such as sugars, to produce ATP, the energy currency of the cell.

in 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 do not have the same structural needs as plant cells. Instead, animal cells rely on their plasma membrane to provide shape and support. The absence of a rigid cell wall allows animal cells to be more flexible and dynamic, enabling them to change shape and move. Additionally, animal cells do not need a central vacuole because they have smaller vacuoles that serve specific functions such as storage, transportation, and waste disposal. The lack of a central vacuole also allows animal cells to have more space for other organelles and cellular processes.

thank you

You're welcome! If you have any more questions, feel free to ask.

In three to five sentences, compare the process of digesting food in an amoeba (unicellular) to those in a mouse (multicellular)

In an amoeba, the process of digesting food is internal and occurs within the cell itself. The amoeba engulfs its food through phagocytosis, forming a food vacuole. Enzymes are then released into the vacuole to break down the food particles, and the resulting nutrients are absorbed directly into the cell. In contrast, in a mouse, the digestion process is complex and involves specialized organs like the stomach, pancreas, and intestines. Food is broken down mechanically and chemically in the digestive system, with enzymes aiding in the breakdown of nutrients. The nutrients are then absorbed into the bloodstream and distributed to the various cells and tissues of the body.