Science Flashcards
Graphite and diamond are two of the most interesting minerals. They are identical chemically as both are composed of carbon, but physically they are very different. Minerals which have the same chemistry but different crystal structures are called
polymorphs
An allotrope is the
different form an element can exist in. Carbon has three; diamond, graphite and buckyballs.
Diamond and graphite are both forms of carbon. Their properties are different because the carbon atoms in diamond:
are arranged differently than the carbon atoms in graphite
What do you call the coils of DNA and protein that condense to form chromosomes?
chromatin
one copy of a recently copied chromosome.
chromatid
how to determine the number of protons using the periodic table
The number of protons in the nucleus of the atom is equal to the atomic number (Z).
Using the periodic table, you can find the atomic mass number by looking
at the number directly below the symbol
how do you find the number of neutrons
subtract the atomic number from the mass number to find the number of neutrons.
Which of the following statements is true of the the noble gases?
They have a low electron affinity because of the full outer shell.
They want to gain one electron to develop a full electron outer shell.
They have a high conductivity.
They are highly reactive.
They have a low electron affinity because of the full outer shell.
the noble gases are in the farthest right column of the periodic table. This tells us they have a full outer shell, don’t react, and will remain in a oxidative state of 0.
Ectoderm
central and peripheral nervous system.
sensory epithelia, epidermis, and appendages.
Mesoderm
connective tissues, striated and smooth muscles, gonads, etc
Endoderm
Epithelial lining of the GI and respiratory tract, etc.
What part of the brain is the relay center
Pons
What part of the brain controls hormone production
Hypothalamus
What part of the brain controls emotion and motivation
Amygdla
What part of the brain is responsible for autonomic activities, like breathing and the heart beating.
Medulla
are chromosomes with an unbalanced structural abnormality in which the arms of the chromosome
Iscochromosome
are cells that are produced by chromosome breakage or non-disjunction errors during meiosis and mitosis.
Aneuploid cells
are normal somatic cells containing two of normal chromosomes that should be present for an individual.
Diploid cells
are cells that contain only one copy of each chromosome that should be present for an individual. This usually occurs in the germ cells.
Haploid
The normal human somatic cell contains how many chromosomes,
46
What do you call alleles that lack dominance relationships and result in heterozygotes that have an intermediate phenotype?
Incomplete dominance
Genitourinary system does what
Ex creates waste
An increase in the number of cells, size of cells, tissues, organs, and the body resulting in a single cell becoming a multicellular complex organism is known as which of the following?
Metabolism
