Study guides, Class notes & Summaries

Homologous - Answer-term used to describe pairs of chromosomes having DNA segments, or genes for the same traits What is the organization of genetic information within a cell nucleus? - Answer-Genes--> Chromosomes-- >Nucleus If Yellow is dominant to Green in pea plants and a plant exhibits the yellow phenotype, what are the possible genotypes? - Answer-Yy or YY Which cells are considered gametes in humans? - Answer-Egg (Ova) in females; Sperm in males What is the number of chromosom...

How are organisms classified - Answer--organisms are organized -organisms acquire materials and energy -organisms reproduce -organisms respond to stimuli -organisms are homeostatic -organisms grow and develop -organisms have the capacity to adapt homeostasis - Answer-internal environment of an organism stays relatively constant natural selection - Answer-allows organisms to be better suited for their environment levels of biological organization - Answer-atom-molecule-cell-tissue-organ-...

Homozygous - An organism that has two identical alleles for a specific trait Heterozygous - An organism that has two different alleles for a specific trait. Gregor Mendel - Father of Genetics, studied pea plants and used math and probability to show how traits would show up in the next generation F1 Generation - the first generation of offspring obtained from an experimental cross of two organisms., offspring of the p generation F2 Generation - the second generation of offspring, obtained ...

What are the 3 parts of an atom? - Answer-Electron, Proton, and Neutron What a molecule shares electrons unevenly, it is called - Answer-Polar What is the max number of electrons the orbital closest to the nucleus can hold? - Answer-2 electrons What are the 3 elements found in 98% of all living things? - Answer-Hydrogen, Nitrogen, and Carbon What type of bond is formed when atoms gain or lose electrons achieve a completed outer shell - Answer-Ionic bond If the number of Neutrons in an atom...

Cell - ANSWER the basic unit of living organisms Cell theory - ANSWER Says that all living things are made of cells, that cells are the basic unit of structure and function and that cells only come from other cells. Cell wall - ANSWER a fairly rigid structure located outside the plasma membrane that provides additional support and protection Chlorophyll - ANSWER the green pigment that gives leaves and stems their color

protonema (protonemata) - ANSWER a mass of green, branched, one-cell-thick filaments produced by germinating moss spores protonephridium (protonephridia) - ANSWER an excretory system, such as the flame bulb system of flatworms, consisting of a network of tubules lacking internal openings proton-motive force - ANSWER the potential energy stored in the form of a proton electrochemical gradient, generated by the pumping of hydrogen ions (H+) across a biological membrane during chemiosmosis

Life apparently originated on earth about - ANSWER 3.5 billion years ago The oldest microfossils are of - ANSWER Prokaryotes The early earth's reducing atmosphere probably contained all of the following except - ANSWER Water

What are atoms and elements? - ANSWER a bit of matter that cannot be subdivided any further without losing its essential properties. What are elements? - ANSWER a substance that cannot be broken down chemically into any other substances. Whatever the element, if you keep cutting it into ever smaller pieces, each of the pieces behaves exactly the same as any other piece. What is the difference between atoms and elements? - ANSWER an element will stay an element until the tiny pieces can no ...

ANIMAL TISSUE - ANSWER ---- -Sheets of tightly packed cells that line organs and body cavities -widespread through the body -barrier from foreign viruses, specifically respiratory system -aids in absorbing nutrients in digestive system - ANSWER 1. Epithelial Tissue Epithelial Tissue Characteristifs: - ANSWER -tightly junked together -presence of cell secretion called basement membrane