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Questions in biology

[Terjawab] We gain energy from eating plants. Plants can't create their energy; they must first get it from the Sun. This statement is _____ according to the _____ law of thermodynamics. A. true; first B. true; second C. false; first D. false; second

[Terjawab] Which cell type usually has a large vacuole?

[Terjawab] By controlling what enters and leaves a cell, the cell membrane: A. aids in maintaining homeostasis within the cell. B. aids in maintaining homeostasis outside of the cell. C. aids in maintaining osmosis within the cell. D. aids in maintaining osmosis outside of the cell.

[Terjawab] Ellen is jogging. As her body's metabolism becomes more active, carbon dioxide levels increase, resulting in a decrease in pH. Fortunately, her ___________ in the blood protect against large changes in pH. Select one: a. water b. DNA c. buffers d. lipids

[Terjawab] In the human body, fibrinogen is necessary for sealing cuts and stopping the loss of blood. Since fibrinogen is made of chains of amino acids, it is an example of which type of organic molecule? A. Carbohydrate B. Protein C. Fatty acid D. Nucleic acid

[Terjawab] The theory of continental drift suggests: A. The continents have moved in the past. B. The continents are slowly moving now. C. The continents have moved in the past and are still moving. D. The continents moved in the past but are not moving now.

[Terjawab] Which of the following traits is acquired? 1. The ability of some gorillas to use sign language 2. The number of petals that grow in a plant's flower 3. The wing shape of a wild bird 4. A cheetah's ability to run faster than any other land animal

[Terjawab] A person develops a disease in which her immune system attacks her own connective tissue. Where would this disease have the greatest impact? A. Tendons and cartilage B. Tendons and the epidermis C. Muscles and the spinal cord D. Muscles and bone

[Terjawab] Which of the following must happen before the cell can go through mitosis? A. The cytoplasm must divide. B. The cell must copy its DNA. C. The spindle fibers must break down. D. The sister chromatids must separate.

[Terjawab] During photosynthesis, plants capture light energy from the Sun to break weak bonds in reactants, such as carbon dioxide and water, and form carbon-containing molecules, such as glucose. The carbon-containing molecules can then be used to: 1. Build plant structures. 2. Store energy for later use. 3. Fuel plant growth and development.