Chapter 1-3 plus Plants : gen bio
The type of bond that would form from the transfer of an electron from one atom to another is a(n) ________ bond.
ionic
What do lemons, tomatoes, and coffee all have in common chemically?
They all produce H+ ions in solution, making them acids.
A gene in DNA is the code for assembling a sequence of
amino acids
________________ are known as flowering plants
angiosperms
Which one of the following is the smallest unit of matter that has all the properties of an element?
atom
Glucose, C6H12O6, is best described as a(n)
compound
all plants are multicellular and are composed of ____________ cells.
eukaryotic
Scientists were studying temperature selection amongst pregnant big brown bats. What would be the best control group for this study?
female bats that were not pregnant
____________ is an example of a seedless plant
fern
The purpose of a control group in an experiment is
for comparison to the other test groups.
_______ have cones as the seed-bearing structure
gymnosperms
The weak attractions between water molecules are known as
hydrogen bonds
___________ carries food down the plant
phloem
After drinking a great deal of coffee (pH 5), a human's blood buffering system would need to ________ as the coffee was digested to lower the level of acid present in the blood stream.
take up H+
For metabolic processes to occur within their cells, all living organisms need to maintain homeostasis which means they need
to maintain the correct internal temperature, moisture level, and acidity as well as other factors.
______________ carries water up the plant
xylem
___________ is known as the gametophyte generation
1N haploid stage
__________________ is known as the sporophyte generation
2n diploid stage
Which of the following statements is correctly matched to the step of the scientific method?
A)Leslie set up mist nets to catch bats flying over a small stream. Each bat that was caught was weighed and sexed. (Experimental design) B) Biologists suggested that 2-3 cups of coffee per day can decrease death rates among women. (Hypothesis) C) A researcher reported that red-foot tortoises preferred red-colored fruits and vegetables to those that were green or white. (Conclusion) D) Bethany watched butterflies feeding in a large field of wild flowers. She noticed that more butterflies approached the yellow and purple flowers than the red flowers. (Observation) E) All of the above statements are correctly matched. ANSWER ---ALL
Which of the following is an organic molecule?
C6 H12 O6
If a soda has a pH of 3.5. This means it has an excess of ___________ ions and would be called a(n)
H+; acid
Which of the following statements about atoms is correct?
The number and arrangement of electrons in an atom governs its chemical activity.
Which one of the following is NOT considered a use for lipids?
a) They help to form waterproof coverings on fruits, leaves, and feathers. b) They are an important component of the cell membrane. c) They are used as the structural component of the cell wall of plants. d) They are used to insulate the body THE CORRECT ANSWER IS C
A(n) ________ can be defined as a substance that keeps pH within established limits by taking up excess H+ or OH- in a solution
buffer
The four main categories of organic macromolecules are
carbohydrates, lipids, proteins, and nucleic acids.
A covalent bond occurs when
electrons are shared between two atoms to complete their octets.
An atom's valence electron shell
determines its chemical reactivity.
The polymer shown below is comprised of what kind of subunits?
nucleotides
Which answer choice lists the steps of the scientific method in the correct order?
observation, hypothesis, prediction, experiment, conclusion
Scientists were studying temperature selection among pregnant big brown bats. What would the test group be in this experiment?
pregnant bats
Amino acids are needed to build ________, just as ________ are needed to create DNA.
proteins; nucleotides