Birds descended form (#33) ____ that ran around on two legs some 160 million years ago. All birds have (#34) ______ that insulate and help get the bird aloft. Generally, birds have a greatly enlarged (#35) ____ to which flight muscles are attached. Bird bones contain (#36) ____ _____, and air flows through sacs, not into and out of them, for gas exchange in the lungs. Birds have a large, durable (#37) ____ - _____ ______ that pumps oxygen -poor blood to the lungs, and oxygen-rich blood back to the heart and to the rest of its body, just as you do. Many birds display (#38) ____ behavior: a recurring pattern of relocation between two places in response to environmental rhythms. Birds also lay hard-shelled (#39)_______ eggs, have complex courtship behaviors, and generally nurture their offspring.
There are three groups of existing mammals: those that lay eggs (examples are the (#40) _______ and the spiny anteater), those that are (#41) ________ (examples are the opossum and the kangaroo), and those that are (#42) ______ mammals (there are more than 4,500 species of these). Mammals regulate their body temperature, have a (#43) _____-chambered heart, and show a high degree of parental nurture. Most mammals have (#44)______ as a means of insulation and mammalian mothers generally suckle their young with milk.
Terms to be used above:
F. pouched (marsupials)
H. air cavities
J. sternum (breastbone)
K. four-chambered heart
Energy General Biology Questions
1). Energy is stored in cells when a ------- ------- is added to a molecule of ----------- ----------
2). Write a sentence of two explaining the concept of entropy.
3). Explain what an exergonic reaction is with respect to free energy.
4). What do we mean when we say a substance has been reduced?
5). Gien the terms carbon, amino group, protein, quaternary structure, carboxyl group, peptide, amino acid describe a series of reactions in an anabolic pathway
^).If a certain animal has a diploid chromosome number 48, how many chromosomes would a sprem cell have?
7). Explain the difference between meiosis in males and meiosis in females.
8). Cystic fibrosis is caused by an autosomal recessive gene. Two parents are carriers (heterozygous) for the condition. They have a child. What is the chance the child has cystic fibrosis.
9). Three alleles (A,a, and a') are found at certain locus. List all the possible genotypes for a diploid individual.View Full Posting Details