Lab Practical 1
The charge of an electron is
-1
What is the TOTAL MAGNIFICATION of scanning objective lens?
40x
How many protons does the element nitrogen have?
7
What is the thick, rigid outermost boundary of plant cells?
Cell Wall
What organelle is involved in mitosis in animal cells?
Centrioles
What happens in telophase and what does it look like?
Chromosomes are on opposite ends and cells start to split into 2 daughter cells
Which type(s) of microscope would be used to look at a pond microorganism as it swims?
Compound Light Microscope
Which of the following is considered a trace element in living organisms
Copper
What type of bond is formed when two atoms share electrons?
Covalent Bond
Which type of tissue lines the external and internal body surfaces?
Epithelial
Electrons are found in the nucleus of an atom. True or False
FALSE
Hydrophobic is synonymous with polar. True or False
FALSE
Nitrogen is considered a lesser element in living organisms. True or False
FALSE
The independent variable is the one that is measured during the experiment. True or False
FALSE
When electrons are evenly shared between two atoms a polar covalent bond is formed. True or False
FALSE
The microscope should be stored with the stage all the way up and the lowest power objective (scanning) clicked in place. True or False
FALSE (the stage needs to be all the way down)
Which adjustement knob is used when focusing the high power objective?
Fine Adjustment Knob
Which of the following elements is not an essential nutrient for plant growth?
Hydrogen
What type of solution do animal cells prefer?
Isotonic
__________ is the type of cell division that forms new cells for growth and tissue repair.
Mitosis
The difference between 12C and 14C is the number of
Neutrons
What type of protein is located on the outer surface of the plasma membrane?
Peripheral Proteins
What part of the microscope do the objectives attach to?
Resolving Nosepiece
What organelle is involved in protein synthesis?
Ribosomes
Which type(s) of microscope would be used to view the surface of a leaf to identify the # of trichomes?
Scanning Electron Microscope (SEM)
Which objective do you use to locate specimens on your slide?
Scanning Objective (x4)
Amyloplasts are organelles in plant cells that store starch. True or False
TRUE
Atoms are the smallest division of an element that still exhibits the physical and chemical properties of the element. True or False
TRUE
Capillarity involves the movement of water in the vascular tissue of a plant. True or False
TRUE
Hydrogen bonds can form between the H of one molecule and the F, O or N of another molecule. True or False
TRUE
In a water molecule the oxygen carries a negative charge. True or False
TRUE
Plant mitosis occurs in meristematic tissue which is involved with increasing the length and width of plant structures. True or False
TRUE
Prokaryotes undergo binary fission when dividing which occurs much faster than eukaryotic mitosis. True or False
TRUE
Prokaryotic cells have no true nucleus. True or False
TRUE
Resolution refeers to the microscope's abiltiy to distinguish two closely spaced objects. True or False
TRUE
What happens in prophase and what does it look like?
The nuclear membrane starts to dissolve
What happens with water and a solution in an isotonic solution?
The water that goes in is the same as the amount that goes out
Which type(s) of microscope would be used to view very small internal cell structures, like a chloroplast?
Transmission Electron Microscope (TEM)
Which type(s) of microscopes would be used to view the stomach of a grasshopper? *The stomach is inside the grasshopper- not its belly*
Transmission Electron Microscope (TEM)
Chromosomes only become visible during cell division. True or False
True
Viruses are only genetic material surrounded by a protein coat. True or False
True
Which surface is more hydrophobic? a.) b.)
a.)
Poison ivy is a weed that produces an oil which causes skin rashes. Scientists want to perform an experiment to see if poison ivy grows taller when exposed to more carbon dioxide. How should the control group in this experiment be treated? a.) The control group should have plants growing at normal carbon dioxide levels. b.) The control group should have plants growing at different carbon dioxide levels. c.) The control group should have plants growing in different amounts of water.
a.) control group should have plants growing at normal carbon dioxide levels.
Which statement best describes a hypothesis? a.) A hypothesis is the process of making careful observations. b.) A hypothesis is a possible, testable explanation for a scientific question. c.)The facts collected from an experiment are written in the form of a hypothesis. d.) A hypothesis is the correct answer to a scientific question.
b.) A hypothesis is a possible, testable explanation for a scientific question
Students in a class recorded their resting pulse rates and their pulse rates immediately after exercise. According to the data, the average pulse rate immediately after exercise was higher than the average resting pulse rate. Which procedure would increase the validity of the conclusions from this experiment? a.) Decreasing the number of students participating in the activity b.) Changing the temperature in the room before and after exercise c.) Increasing the number of times the activity is repeated d.) Eliminating the data where resting pulse rate is taken
c.) Increasing the number of times the activity is repeated
What happens in anaphase and what does it look like?
chromosomes start separating and moving to opposite ends
What happens in metaphase and what does it look like?
chromosomes uncoil and line up in the middle of the cell
Alysha wants to test the effect of different materials on the melting rate of ice. She finds the initial mass of four pieces of ice. She then covers three pieces with either tinfoil, plastic wrap, or paper. The fourth piece is left uncovered. After 30 minutes, Alysha calculates the final mass of each piece of ice to determine which melted the fastest. What are the independent and dependent variables in Alysha's experiment? a.) The dependent variable is the mass of the ice, and the independent variable is the time the ice takes to melt. b.) The dependent variable is the type of cover material, and the independent variable is the mass of the ice. c.) The dependent variable is the time the ice takes to melt, and the independent variable is the type of cover material. d.) The dependent variable is the mass of the ice, and the independent variable is the type of cover material.
d.) The dependent variable is the mass of the ice, and the independent variable is the type of cover material.
Which of the following is not a characteristic of living organisms? a.) They respond to changes in their environment. b.) They can reproduce. c.) They maintain homeostasis. d.) They change their external environment.
d.) They change their external environment
This is the molecular structure of butane. It can be classified as a ____________________ molecule.
hydrophobic
________ is used as a starch indicator.
iodine
What organelle contains a double membrane and converts chemical energy into ATP?
mitochondria
To find the atomic mass of an element you will need to add the
protons and neutrons
