midterm review bio

Which sentence represents a hypothesis? 1) Environmental conditions affect the pollination of plants. 2) Boil 100 milliliters of water, let it cool, and then add 10 seeds to the water. 3) Is water depth in a lake related to available light in the water? 4) A lamp, two beakers, and elodea plants are selected for the investigation.

1) Environmental conditions affect the pollination of plants.

A student placed a food sample in a test tube. She added Benedict's solution to the sample and heated the test tube in a boiling water bath. After a few minutes, no color change was observed. Which conclusion could correctly be drawn? 1) Glucose is not present. 2) Protein is not present. 3) Glucose is present.4) Protein is present.

1) Glucose is not present.

Which condition is necessary for enzymes and hormones to function properly in the human body? 1) These chemicals must have a specific shape. 2) These chemicals must be able to replicate. 3) Body temperature must be above 40°C.4) Body pH must be above 10.

1) These chemicals must have a specific shape.

All cells of an organism are engaged in many different chemical reactions. This fact is best supported by the presence in each cell of thousands of different kinds of 1) enzymes 2) nuclei 3) chloroplasts 4) organelles

1) enzymes

Which term is defined as all the chemical reactions that are required to sustain life? 1) metabolism 2) nutrition 3) regulation 4) synthesis

1) metabolism

Which life function is most directly involved in the control of the muscles of an earthworm that is moving from dry to moist soil? 1) regulation 2) transport 3) nutrition 4) excretion

1) regulation

In plants, simple sugars are least likely to be 1) linked together to form proteins2) broken down into carbon dioxide and water 3) used as a source of energy4) stored in the form of starch molecules

2) broken down into carbon dioxide and water

Which organelle is correctly paired with its function? 1) golgi apparatus— provides carbohydrates for respiration 2) chloroplast — serves as a site for photosynthesis 3) centriole — synthesizes digestive enzymes 4) lysosome — packages cellular products

2) chloroplast — serves as a site for photosynthesis

The leaves of a plant are dotted with openings known as stomata. When open, stomata allow the plant to exchange gases and allow moisture to evaporate, helping to draw water from the roots up into the plant. These activities help the plant to 1) produce light energy 2) maintain homeostasis 3) decompose organic matter 4) synthesize mineral

2) maintain homeostasis

Nutrition involves those activities by which organisms 1) remove cellular waste products 2) obtain and process materials needed for other activities 3) exchange gases with their environment 4) absorb and circulate materials

2) obtain and process materials needed for other activities

Organisms combine simple molecules to form complex molecules by the process of 1) ingestion 2) synthesis 3) regulation 4) hydrolysis

2) synthesis

The diameter of the field of a microscope under low power magnification is 1.2 millimeters. What is the diameter in microns? 1) 12 microns3) 1,200 microns 2) 120 microns4) 12,000 microns

3) 1,200 microns

How does the CONTROL GROUP setup in an experiment differ from the other setups in the same experiment? 1) It tests a different hypothesis.2) It has more variables.3) It does not receive the experimental treatment. 4) It utilizes a different method of data collection

3) It does not receive the experimental treatment.

Which statement about the use of independent variables in controlled experiments is correct? 1) A different independent variable must be used each time an experiment is repeated. 2) The independent variables must involve time. 3) Only one independent variable is used for each experiment. 4) The independent variables state the problem being tested.

3) Only one independent variable is used for each experiment.

What cellular structure must oxygen cross to get from the outside to the inside of an animal cell? 1) The nucleus2) The cytoplasm3) The plasma membrane 4) The cell wall

3) The plasma membrane

Plants such as the Venus flytrap produce chemical compounds that break down insects into substances that are usable by the plant. The chemical compounds that break down the insects are most likely 1) fats 2) minerals 3) biological catalysts 4) complex carbohydrates

3) biological catalysts

Which cell structure is correctly paired with its primary function? 1) nucleolus-package lipids2) cell wall-photosynthesis3) nucleus-control center of cell4) rough endoplasmic reticulum- cellular respiration

3) nucleus-control center of cell

In an experiment to test the effect of exercise on the number of times a clothespin can be squeezed in 1 minutes, the dependent variable would be the 1) test subject 2) amount of exercise 3) number of squeezes 4) clothespin

3) number of squeezes

Which life activity is not required for the survival of an individual organism 1) nutrition 2) respiration 3) reproduction 4) synthesis

3) reproduction

Which organelle is correctly paired with its specific function? 1) cell membrane—storage of hereditary information 2) chloroplast—transport of materials3) ribosome—synthesis of proteins4) vacuole—production of ATP

3) ribosome—synthesis of proteins

Which substance is an inorganic molecule? 1) starch 2) DNA 3) water 4) fat

3) water

The cytoplasm is to the cell as 1) rocks are to the ocean2) fish are to the ocean3) water is to the ocean4) the coral reef is to the ocean

3) water is to the ocean

A student prepared a test tube containing yeast, glucose, and water. After 24 hours, the test tube was analyzed for the presence of several substances. What substance would the student expect to find if respiration occurred in the test tube? 1 a hormone 2 starch3 nitrogen 4 carbon dioxide

4 carbon dioxide

A transparent metric ruler is placed on the stage of a microscope and observed under low power. The diameter of the field of vision was found to be 2 millimeters. How many micrometers is the diameter? 1) 10 2) 200 3) 1,000 4) 2,000

4) 2,000

Which statement concerning proteins is not correct? 1) Proteins are long, usually folded, chains. 2) The shape of a protein molecule determines its function. 3) Proteins can be broken down and used for energy. 4) Proteins are bonded together, resulting in simple sugars.

4) Proteins are bonded together, resulting in simple sugars.

Respiration is best described as a process by which 1) necessary nutrients are circulated 2) hydrogen is used to synthesize glucose 3) metabolic wastes are absorbed 4) chemical energy is converted into a usable form

4) chemical energy is converted into a usable form

The removal of carbon dioxide and nitrogenous wastes from an organism illustrates the life function known as 1) regulation 2) nutrition 3) respiration 4) excretion

4) excretion

A company that manufactures a popular multivitamin wanted to determine whether their multivitamin had any side effects. For its initial study, the company chose 2000 individuals to take one of their multivitamin tablets per day for one year. Scientists from the company surveyed the participants to determine whether they had experienced any side effects. The greatest problem with this procedure is that 1) only one brand of vitamin was tested 2) the study lasted only one year3) the sample size was not large enough 4) no control group was used

4) no control group was used

Which sequence represents the levels of biological organization from smallest to largest? 1) organism ® cell ® tissue ® organelle ® organ system ® organ 2) organ system ® organ ® organism ® cell ® tissue ® organelle 3) organelle ® organ system ® cell ® organism ® tissue ® organ 4) organelle ® cell ® tissue ® organ ® organ system ® organism

4) organelle ® cell ® tissue ® organ ® organ system ® organism

A scientist conducted an experiment to test the hypothesis that maple seeds exposed to acid rain will take longer to germinate than seeds exposed to normal rain, which has a pH of 5.6. The scientist set up four groups, each containing 200 maple seeds. The water used for each group had a different pH value: 5.6, 4.0, 3.0, and 2.0. All other conditions were kept the same. After ten days, the number of seeds that had germinated in each group was counted. Identify the control group in this experiment.

The control group in this experiment is the water with a pH of 5.6.

A scientist conducted an experiment to test the hypothesis that maple seeds exposed to acid rain will take longer to germinate than seeds exposed to normal rain, which has a pH of 5.6. The scientist set up four groups, each containing 200 maple seeds. The water used for each group had a different pH value: 5.6, 4.0, 3.0, and 2.0. All other conditions were kept the same. After ten days, the number of seeds that had germinated in each group was counted. Identify the dependent variable in this experiment.

The dependent variable is the growth of the maple seeds