Bio Exam 2 Flashcards
The name of the meristem that ultimately gives rise to secondary xylem and phloem is
vascular cambrium
Of the following features which is mostly likely shared in the animal kingdoms
a symmetrical body plan
Plants regulate gas exchange and water loss via
guarded stomata
What is the role of cleavage in the early embryo?
produce many cells
True segmentation is found in which of the following phyla?
Arthropods, Annelida, Chordata
A human recessive trait appears in 1 in 100 births. What frequency of people are homozygous dominant for this trait?
0.81
Human fetus hemoglobin has a what?
has a higher affinity for O2 than adult hemoglobin has.
A tyrannosaurus rex’s (a dinosaur) closest relative is a
chickens, birds
Low body temperature triggers adaptive responses to conserve heat. Once the integrating center detects that body temperature has risen, it will decrease these responses? What does this exemplify?
Negative feedback
The hallow crater formed during gastrulation is known as a
archenteron
Which of the following is not a fetal membrane?
endometrium
____ Do not have tidal flow of air
birds
Many plants devote significant resources to growing colorful, fragrant flowers filled with nectar. What does this illustrate the importance of?
outcrossing
The lungs in birds and mammals both
exchange O2 and CO2 with blood in capillaries
Which tissues are incorrectly matched to their progenitor germ layer?
endoderm- muscles
During a drought on the Galapagos island, finches with higher beaks were able to arrack the largetoguh seed produced by parts that survived the dry conditions. This is an example of
directional selections
Structures that have no apparent function but had a function in ancestral species are vestigial structures
vestigal structures
An adaption in arthropods that allowed them to colonize land was
the ability to close spiracles to prevent water loss
Which structure does NOT represent a mode of vegetative reproduction?
seeds
Birds, like mammals, can regulate their body temperatures within close limits. Therefore birds and mammals are called
endothemric
Several species of sea urchins live close to each other and practice external fertilization. They seldom interbreed because eggs produce chemicals that are only attractive to sperms of their own species. This is an example of a ____ barrier that ________
pre-zygotic: that prevents gametes fusion
In fish
Blood flows over the gas exchange surfaces in a direction opposite of the flow of water ( counter current flow)
The process of moving water through a plant by transpiration works because water molecules stick to each other with:
hydrogen bonds
The frequency of a particular allele within a population can be changed, over time, by
selection
Water moves through a plant by each of the following methods except
through the Caspian strip
Hemoglobin releases ______ in acidic environment
more O2
Increased CO2 bloodstream results in
the rate of respiration increasing
In Drosophila, the cells created by cleavage contain different developmental signals from the egg called cytoplasmic
determinants
Which of the following is false?
Myoglobin has a lower affinity for O2 than hemoglobin does
veins in leaves consist of
vascular cells
Which one of the following features is unique to animals?
moments associated with muscle tissue and nervous tissues
Dogs use panting to dissipate excess heat. What part of their brain detects the need for this response and sends the signal to pant?
Hypothalamus
Which os the following is NOT a mechanism to prevent polyspermy?
species proteins inside the eggs compare the DNA of different sperms, choosing the most adapted on
How can you distinguish sea urchin embryos from frogs gastrula embryo?
Sea urchin have relatively yolk- poor eggs with similar animal and vegetal of poles, whereas frogs have large amounts yolk distinguishing the vegetal pole from animal pole
The uneven distribution of an impermeable solute on either side of a membrane will result in
osmosis
All blastula contains an
hallow blastocel
Unlike primary growth, secondary growth
involves growth in plant diameter
Plants regulates water loss via
guarded stromata
What is the role of the cleavage in the early embryo?
Produce many cells
True or False Segmentation is found in which of the following phyla?
Arthropoda, Annelida, Chordata
Which of these is not a method used by ectotherms to affect body temperature?
increasing metabolic rate
________ combines with water to form carbonic in the capillaries
CO2
Pure water without applied pressure has a water potential that is equal to
0.0 MPa
As adaptations for flight, the wings of bats and the wings of birds are an example of
Convergent evolution
The nutritious flesh of many fruits has the function of
Attracting seed dispenser
What pattern of cleavage is the characteristics in mammals?
Holoblastic cleavage with eggs containing very little yolk but the inner cell is concentrated at one pole
