Exam 2 Flashcards
What is the correct sequence of blood flow in birds and mammals?
Vena cava –> right atrium –> right ventricle –> pulmonary artery
The development of limbs is the most significant event in the evolution of
Vertebrates
Double fertilization occurs in _____ and produces _____ and _____.
Angiosperms… the embryo… the endosperm
The structure that is part of the gametophyte and produces sperm is the
Antheridium
Which of the taxa does the mature sphorophyte depend completely on the gametophyte for nutrition?
Bryophyte
The major mechanism driving xylem flow is ____. Plants _____ need to expend energy to drive xylem flow by this process.
Transpiration/cohesion tension… do not.
Hemocyanin is the respiratory pigment of _____ and uses _____ as the oxygen binding component.
Arthropods; copper.
Which structures permit gas exchange in plants?
Stomates in leaves; lenticels in stems; aerenchyma in roots.
What is true regrading the nasal passage?
It is involved in the warming of inhaled air.
The adult stem cells found in red bone marrow from which all blood cells are derived are called ____.
Hemocytoblasts.
In angiosperms, the pollen grain is the ______.
Male gametophyte.
Re-ingesting cecotrophes is important for the nutritional balance of _____.
Rabbits.
In which phylum do you see organisms that posses an ostia, porocytes, and choanaocytes and clerocytes?
Porifera.
In which major plant group did the true vascular system first appear?
Ferns.
Which if the following is/are characteristics of all primates?
Opposable thumbs.
Birds have 3 types of feathers, primary, secondary, and contour feathers. What is the function of secondary feathers?
They are located closer to the body and provide lift.
In which of the following are there valves to prevent blood from flowing the wrong direction?
Veins and between the atria and ventricles of the heart.
Which of the following characteristics helped to facilitate flight in birds?
Pneumatic bones.
What happens on the source end of phloem tubes?
Loading of sugars into phloem elements causes inflow of water by osmosis.
Features advantageous for terrestrial life possessed by reptiles, but not by amphibians are _____ and _____.
Keratinized scales; amniotic eggs.
In the amniotic egg, what is the function of the amnion/amniotic membrane?
Produces a fluid that baths and protects the embryo.
The phase of the life cycle of land pants that produces spores is the _____.
Sporophyte.
Activation of pepsin in the stomach _____.
Initiates the chemical digestion of protein in the stomach.
Bony skeleton, swim bladder, gills and being covered in scales best describes _____.
Osteichthyes.
