Food moves along the digestive tract as the result of contractions by EXAM 2 BONUS
smooth muscle
An example of a properly functioning homeostatic control system is seen when EXAM 2 BONUS
the kidneys excrete salt into the urine when dietary salt levels rise
Positive feedback has occurred when EXAM 2 BONUS
uterine contractions needed for the birthing process are expedited by the pressure of a moving baby in its mother's uterus
To prepare flight muscles for use on a cool morning, hawkmouth moths EXAM 2 BONUS
rapidly contract and relax these muscles to generate metabolic warmth
If you were to prune the shoot tips of a plant, what would be the effect on the plant and the leaf area index? EXAM 2 BONUS
bushier plants, higher leaf area indexes
An example of an organism that has only behavioral controls over its body temperature is the EXAM 2 BONUS
green frog
In flowering plants, pollen is released from the EXAM 2 BONUS
anther
The most immediate potential benefits of introducing genetically modified crops include EXAM 2 BONUS
increasing crop yield
A parent with an S1S2 genotype exhibiting sporophytic self-incompatibility can potentially fertilize which of the following plant genotypes of the same species with pollen grains? EXAM 2 BONUS
S3S4
One disadvantage of monoculture is that EXAM 2 BONUS
genetic uniformity makes a crop more vulnerable to a new pest or disease
Exam 1 Questions:
1) An individual mixotroph loses its plastids, yet continues to survive. Which of the following most likely accounts for its continued survival?
It engulfs organic material by phagocytosis or by absorption
2) The larvae of many common tapeworm species that infect humans are usually found
Encysted in the muscles of an animal such as cow or pig
3) Protists are alike, in that all are.....?
Eukaryotic
4) Which of the following conditions is caused by a fungus that is accidentally consumed along with rye flour?
Ergotism
5) Mitotic activity by the apical meristem of a root makes which of the following more possible?
Increase of the above ground stem
6) Which two genera have members that can evade the human immune system frequently changing their surface protein?
Trypanosoma and Plasmodium
7) In life cycles with an alternation of generation, multicellular haploid forms alternate with
multicellular diploid forms
8) Which taxon is essentially equivalent to "Embryophytes"
Plantae
9) The functional role of sporopollenin is to primarily
Reduce dehydration
10) In the monocots, the number of petals in their flowers is divisible by 3 while in eudicots its divisible by 4 or 5 (TRUE/FALSE)
TRUE
11) Which of the following characteristics helped seedless plants better adapt to life on land?
Stomata on leaf
12) Which of the following characteristics added more to vertebrate success in relatively dry environments?
The shelled, amniotic egg
13) If fern gametophyte is a hermaphrodite then it
Belongs to species that is homosporous
14) Increasing the number of stomata per unit surface area of leaf when atmospheric CO2 level decline is most analogous to human
putting more Red Blood Corpuscles (RBCs) into the circulation when atmospheric O2 levels decline
15) In plants which of the following are directly produced by meiosis?
Haploid spores
16) Which of the following is a characteristic of most extant species reptiles and most extant mammals?
Keratinized skin
17) Which of the following terms refers to the symbiotic relationships that involve fungi living between the cells in plant leaves?
Endophytes
18) Which phylum is characterized by animals that have segmented body?
Arthropoda
19) Angiosperm are the most successful terrestrial plants. Which of the following features is unique to them and helps account for their success?
Fruits enclosing seeds
20) Which of the following is unique to animals?
Nervous conduction and muscular movement
21) When a mycelium infiltrates an unexploited source of dead organic matter, what is most likely to appear within the food source soon thereafter?
Fungal enzymes
22) Chemicals secreted by soil fungi, that inhibit the growth of bacteria are known as
Antibiotics
23) Orchid seeds are tiny with virtually no endosperm and with minuscule cotyledons. If such seeds are deposited in a dark, moist environment, then which of the following represents the most likely means by which fungi might assist in seed germination given what seed lack?
By providing embryos with some of the organic nutrients they have absorbed
24) Acoelomates are characterized by
A solid body without a cavity surrounding internal organs
25) Which chemical is synthesized by sponges and acts as an antibiotic?
Cribostatin
26) Trypanosoma gambiae, transmitted by tse tse flies is the parasite that causes malaria (TRUE/FALSE)
FALSE
27) What would be the most effective way of reducing the incidence of blood fluke in humans?
Reduce the freshwater snail population
28) Trematodes that parasitize the humans spend part of their lives in snail hosts (TRUE/ FALSE)
TRUE
29) Humans most frequently acquire trichinosis by
Eating undercooked pork
30) One summer Taryn returns to family farm from college. Observing the pond, she is fascinated by some six-legged organisms that can crawl above on submerged surface or when disturbed seemingly "jet" through the water
Insects
31) Blood flukes can dodge immune responses and thrive in a human host for more than 40 years (TRUE/ FALSE)
TRUE
32) Ciliates typically have single nucleus (TRUE/ FALSE)
FALSE
33) Heterotrophs are organisms that combine photosynthesis and heterotrophic nutrition (TRUE/ FALSE)
FALSE
34) Apicomplexans enter and spread through their host as infectious cells called sporozoites (TRUE/ FALSE)
TRUE
35) Tapeworms are dangerous to human health because they have a very efficient digestive system which enables them to cause nutritional deficiencies by robbing lots of nutrients from their human hosts. (TRUE/ FALSE)
FALSE
Exam 1 Bonus Questions:
1) Which of the following statements concerning protists is true?
All protists have mitochondria, though in some species they are much reduced and known by different names
2) Cutting down rain forest can lead to
Decreased rainfall
3) Phylogenetic trees are best described as
Hypothetical portrayals of evolutionary relationships
4) Which of the following pairs of protists and their characteristic is mismatched?
Ciliates - Red tide organisms
5) Which of the following is correctly described as a primary producer?
Diatom
6) In addition to seeds, which of the following characteristics are unique to the seed-producing plants?
Pollen
7) Which of the following statements is true of archegonia?
They temporarily contain sporophyte embryos
8) Largest to Smallest
Gametophyte ----> Gametangia ----> Antheridia ----> Gametes
10) A fruit is most commonly
a mature ovary
11) Which of the following are structures of angiosperm gametophyte?
Pollen tubes
12) Which of the following are characteristics of hyphae fungi?
They are adapted for rapid directional growth to new food sources
A student measures water potential and takes a reading in normal daylight, with the stomata open, and photosynthesis occurring what should the data look like if the cohesion-tension mechanism is operating? EXAM 2
Ψ atmosphere < Ψ leaves < Ψ roots < Ψ soil
Photosynthesis ceases when leaves wilt mainly because EXAM 2
stomata close, preventing carbon dioxide from entering the leaf
Ten tomato plants were germinated and kept in a large tray with no drainage after several weeks they wilt and die despite watering and fertilization this is because EXAM 2
lack of oxygen for the roots
Which soil mineral is leached during hard rain EXAM 2
NO3 -
A farmer buys land in a relatively arid area and wants to make money off of it for a several years what advice would you give the farmer? EXAM 2
selecting crops adapted to arid areas
NPK percentages on a package of fertilizer refer to EXAM 2
The percent of 3 different mineral nutrients
A plant is suffering from mineral deficiency after being treated with fungicide, what caused it EXAM 2
mycorrhizal fungi were killed
What experiment is the best way to determine if an element is essential for plant growth? EXAM 2
grow plant using hydroponics with and without the element
What element is often limiting nutrient for plant growth EXAM 2
nitrogen, potassium, phosphorus
Nitrogen fixation is a process that EXAM 2
converts nitrogen gas into ammonia
When weeding your garden you expose roots of pea plants and see swelling on the roots and reddish tinge to the ones you damaged, most likely your pea plants are EXAM 2
benefiting from mutalistic bacterium
Correct order of floral organs from outside to inside of a complete flower EXAM 2
sepals - petals - stamens - carpels
Sperm cells are formed in plants by EXAM 2
mitosis in male gametophytes
Which of the following flower parts develop into seed EXAM 2
ovule
the generative cell male angiosperm gametophyte is haploid, it divides to produce two haploid sperm cells, what type of cell division is used to produce the sperm cells EXAM 2
mitosis
Which of the following is correct regarding flowering plants EXAM 2
pollination is the delivery of pollen to the stigma of a carpel
Animal and Insect pollinated produces 1000 pollen grains while wind produces 1,000,000 pollen grains what does that indicate EXAM 2
wind pollination is less efficient then animal-assisted pollination
Angiosperms are the most successful terrestrial plants, which feature is unique to them and made for their success EXAM 2
fruits inclosing seeds
The coordination of a vertebrate body from chemical signals by the EXAM 2
endocrine system
If you bend your ear and let go it returns to shape because the cartilage contains EXAM 2
elastic fibers
All animals large or small have EXAM 2
most cells in contact with aqueous medium
What type of tissue would the term carcinoma and melanoma is closely associated with EXAM 2
epithelial
An elephant and mouse run around in the sun, overheat, then go in the shade to rest who cools down faster EXAM 2
mouse will, higher surface-area-to-volume ratio
blood glucose rises, pancreas secretes insulin, as result levels decrease, when level is low pancreas secretes glucagon it rises, such regulation of blood glucose level is result of EXAM 2
negative feedback
advantages + disadvantages to adaptions, Endotherms are at a disadvantage in EXAM 2
environments with variable and limited food sources
energy budgets of a human, elephant, penguin, mouse, snake ______ has highest annual energy and _____ highest energy expenditure per unit mass EXAM 2
elephant; mouse
The Human Knee-Jerk reflex requires an intact (EXAM 4)
Spinal cord
The divisions of the nervous system that have antagonistic or opposing actions are (EXAM 4)
Sympathetic and Parasympathetic systems
Internal and external fertilization membrane requires an increase in the availability of (EXAM 4)
Calcium ions
If gastrulation was blocked by an environmental toxin then (EXAM 4)
Embryonic germ layers would not form
The vertebrate ectoderm is the origin of (EXAM 4)
Nervous and sensory systems
From earliest to latest, the overall sequence of early development proceeds in which of the following sequences (EXAM 4)
Cleavage -> Gastrulation -> Organogenesis
Animal cells that are present only for a brief developmental phase will, following completion of that phase, undergo (EXAM 4)
Apoptosis
Cells transplanted from the neural tube of a frog embryo to the ventral part of another embryo develop into nervous system tissue. This result indicates that the transplanted cells were (EXAM 4)
Determined
Most of the neurons in the human brain are (EXAM 4)
Interneuron
A common feature of action potentials is that they (EXAM 4)
Are triggered by a depolarization that reaches the threshold
The “threshold” potential of membrane (EXAM 4)
Is the minimum depolarization needed to operate the voltage-gated sodium and potassium channels
Cerebrospinal fluid can be described as all of the following except (EXAM 4)
Formed from layers of connective tissue
Supposing you dived to the bottom of the ocean to study fish and discovered a population of fish that are only females. Give the type of reproduction these fish most likely use (EXAM 4)
Parathenogensis
The “undershoot” phase of after hyper polarization is due to (EXAM 4)
Sustained opening of voltage-gated potassium channels
Immediately after an action potential passes along an axon, it is not possible to generate a second action potential; thus, we state (EXAM 4)
Refractory
Neurotransmitters are released from axon terminals via (EXAM 4)
Exocytosis
The fastest possible conduction velocity of action potentials is observed in (EXAM 4)
Thick, myelinated neurons
Neural transmission across a mammalian synapse gap is accomplished by (EXAM 4)
Impulse causing the release of a chemical signal and its diffusion the gap
Neurotransmitters affect postsynaptic cells by (EXAM 4)
All of these options are correct
Environmental cues that influence the timing of reproduction generally do so by (EXAM 4 BONUS)
Direct effects on hormonal control mechanisms
The blood-brain barrier (EXAM 4 BONUS)
Is formed by tight junctions
Among non-mammalian vertebrates the cloaca is an anatomical structure that functions as (EXAM 4 BONUS)
A shared pathway for the digestive, excretory, and reproductive system
A reproductive difference between sea urchins, and humans (EXAM 4 BONUS)
The sea urchin egg completes meiosis prior to fertilization, but meiosis in humans is completed after fertilization
Contact of a sea urgent egg with signal molecules on sperm cause the egg to undergo brief (EXAM 4 BONUS)
Membrane depolarization
Preparation for the fight-or-flight response includes activation of the ____ nervous system (EXAM 4 BONUS)
Sympathetic
The primitive streak in a bird is the function equivalent of (EXAM 4 BONUS)
The lip of the blastopore in the frog
Action potentials normally carried in only one direction from the axon hillock toward the axon terminals. If you experimentally depolarize the middle of the axon to threshold, using an electronic probe, then (EXAM 4 BONUS)
two action potentials will be initiated are going toward the axon terminal and one going back towards the headlock
a chemical that affects neuron function, but is not stored in the presynaptic vesicles is (EXAM 4 BONUS)
Nitric oxide
The coronation of groups of skeletal muscles is driven by activity in the (EXAM 4 BONUS)
cerebellum
A Human sperm cells first arise in the (EXAM 4 BONUS)
Seminiferous tubles
Increasing the temperature of the human scrotum of 2°C (i.e, near the normal body core temp) and holding it there would (EXAM 4 BONUS)
Reduce the fertility of the men by impairing, spermatogenesis
The vitelline layer of the sea urchins eggs (EXAM 4 BONUS)
has receptor molecules that are specific for binding acrosomal proteins
At the time of fertilization, the complete maturation of each oogonium has resulted in
One secondary oocyte
For a neuron with an initial membrane potential at -70 mv an increase in the movement of potassium ions out of the neurons cytoplasm would result in (EXAM 4 BONUS)
The hyperpolarization of the neuron.