Exam 1 BIO
Living organisms maintain a constant internal environment by sensing and responding to their internal conditions. This stable maintenance of internal conditions is 1. homeostasis 2. evolution 3. reproduction 4. sensation
1. homeostasis
A scientific hypothesis must be constructed with which of the following characteristics? 1. it is always provable and clearly states what is already known to be fact 2. it provides reasonable explanation to a question and is consistent with current observations it must be testable and falsifiable 3. it provides an explanation consistent with accepted theological ideas and does not need to be tested 4. it does not require testing by experiment or observations, it is not falsifiable
2. it provides reasonable explanation to a question and is consistent with current observations it must be testable and falsifiable
A species of butterflies gradually become darker in color over generations this is an example of which characteristics of living organisms? 1. they reproduce using DNA 2. they obtain energy from the environment to support metabolism 3. they evolve as groups 4. they sense the environment and respond to it
3. they evolve as groups
whenever we __________we are proceeding scientifically 1. invoke a supernatural power as an explanation for how a natural phenomena occurred 2. stop questioning our observations 3. try to solve a problem by systematically evaluating the plausibility of various solutions 4. develop an unchangeable and definite explanation
3. try to solve a problem by systematically evaluating the plausibility of various solutions
is it important for scientists to communicate their results to fellow scientists? 1.yes, scientists want to receive recognition and monetary reward for their work 2. no, there is no reason for scientists to communicate their results 3. yes the quality and accuracy of the scientific work can be enhanced by input , review and possibly even repetition by other scientists. 4. no communication between scientists is discourages
3. yes the quality and accuracy of the scientific work can be enhanced by input , review and possibly even repetition by other scientists.
which is the most basic 1. 5 2. 7 3. 8 4. 10
4. 10
The subatomic particles that possess a single negative charge and surround the nucleus are the 1. isotopes 2. protons 3. neutrons 4. electrons
4. electrons
living cells have an intact phospholipid bilayer that seperates the cell from its external enviroment this structure is referred to as 1. nucleus 2. mitochondria 3. endoplasmic reticulum 4. plasma membrane
4. plasma membrane
if a plant has 18 chromosomes how many will be present in its gametes
9
stages of inter phase
S, G1, G2
what are the similiarities between mitosis, meiosis, and binary fission
all 3 are used to produce daughter cells
photosynthesis and cellular respiration are both complementary of each other early history on life showed increased oxygen concentration. this indicates that
amount of photosynthesis occurring exceeded the amount of cellular respiration
Viruses
are a small piece of genetic material encased in proteins, non-cellular infectious agents that are only capable of reproducing when inside a living cell
nucleotides
are the building blocks of nucleic acids
the central element found in organic molecules is 1. calcium 2. carbon 3. silicon 4. sodium
carbon
chemical reactions that break down lipids are
catabolic
Recently, beekeepers have noticed an alarming and sudden disappearing of honeybees from their hives. Some beekeepers and environmentalists worry that crops genetically engineered to contain the gene for the Bt insecticidal toxin may be killing the bees. Which of these experiments tests the hypothesis that Bt is killing the bees?
collecting hundreds of bees. half of the bees will be kept in a facility with plants genetically engineered to contain Bt toxin while the other half will be kept in a facility with plants not genetically engineers for Bt and both sets will be calculated and compared.
homologous chromosomes
consist of maternal and paternal copy of each chromosome
summarize the events in the calvin cycle
cycle uses ATP and NADPH to produce sugars
You are given an unknown substance and asked to determine if it is polar or nonpolar. The easiest way to do so is
determine whether the compound dissolves in water
an acid is a polar substance that dissolves in water and
donates hydrogen ions to the solution
first law of thermodynamics is
energy cannot be created or destroyed
three stages of cellular respiration are
glycosis, krebs cycle, and oxidative phosphorylation
a given enzyme
increases the rate of a particular reaction
Which of the following distinguishes ionic bonds from covalent bonds?
ionic bonds hold together oppositely charged atoms, whereas covalent bonds hold together atoms that share electrons
the smooth endoplasmic reticulum
is the site where lipids destines for cellular compartments are manufactured
capture and use of energy by living organisms involve numerous chemical reactions, these are known as
metabolism
chromosomes line up at the middle of the cell during
metaphase
your muscle cells need large amounts of ATP to function in the movement of your body. which organelles would you expect to be especially abundant in muscle cells?
mitochondria
during the process of ________ the water diffuses across a semipermiable membrane from one area where water is more concentrated to an area where water is less concentrated
osmosis
goal of mieosis
produce eggs and sperm
ribosome are very small non membranous organelles, that can either exist freely in the cytoplasm or be embedded in the endoplasmic reticulum of a cell. they are associated with the synthesis of
proteins
carbon dioxide is one product of a metabolic process which occurs in plants and animals. this process is
respiration
If a bottle of perfume is sprayed in a corner of a room, the students closest would smell it first and the students farthest would eventually smell it. This is
simple diffusion
what is the role of water in photosynthesis
water provides electrons to the chlorophyll
what is the importance of photosynthesis to other organisms besides plants
we eat plants and absorb the energy they make through photosynthesis
best analogy of the function of the golgi apparatus
worker in a factory who places labels on products and packs them into a shipping box