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UNIT 4:
LS 1-4, 1-5, 3-1, 4-6
| Question | Answer |
|---|---|
| Pollen | yellow powder produced by the stamen of a flower |
| pollination | transfer of pollen grains from the male anther to the female stigma |
| asexual reproduction | reproduction not requiring fertilization; involves one parent |
| sexual reproduction | biological process y plants and animals; combining their genetic material; two parents |
| stigma | part of a flower that receives pollen during pollination |
| anther | part of the flowers stamen that contains the pollen |
| ovary | female reproductive organ that produces eggs |
| hormonal | production of chemicals for specific purposes |
| olfactory | what is heard and/or smelled vocal signals scent markings |
| pheromones | chemical signal that stimulates a response from others |
| plumage | colorful feathers |
| bio luminescence | chemical ability to create a glow/light |
| courtship | communication signals that reduce fear and hostility between potential partners for mating |
| genetics | science of how genes which determine how an organism inherits physical and behavioral characteristics |
| environmental factors | surroundings and conditions in which plants or animals lives and operates It supplies the resources needed for best growth & survival |
| mutations | changes in the genetic material |
| chromosomes | storage unit for DNA |
| genes | instructions for our bodies; directions for building all proteins |
| DNA | instructions in cells; holds genetic info. |
| protein | result of amino acid codons; used to express traits |
| gene therapy | when DNA is introduced into a patient to treat a genetic mutation |
| beneficial mutation | a mutation that helps/improve/provides advantage to an organism |
| harmful mutation | a mutation that harms/decreases advantage to an organism |
| neutral mutation | mutation that does not help nor hurt an organism |
| natural selection | changes in genetic traits over manyy generations |
| What are the advantages of asexual reproduction? | one parent all organisms can reproduce short time ensure survival of species rapid population growth |
| What are the disadvantages of asexual reproduction? | diversity is limited overpopulation genetic clones |
| What are the advantages of sexual reproduction? | unique offspring variation of genes ensure the survival of species |
| What are the disadvantages of sexual reproduction? | must have 2 organisms takes longer fertilization must occur |
| List the types of asexual reproduction | tubers, runners, cuttings, stems |
| List the types of sexual reproduction | spores, conifers, pollination, fertilization |
| Where are genes located? | on chromosomes |
| What is a change in the DNA of a gene or chromosome? | mutation |
| What is a change or the process of change by which an organism or species becomes better suited to its environment? | adaptation |
| What are the nitrogen base pairs in DNA? | A - T T - A C - G G - C |
| What pairs with A in RNA? | U |
| What type of mutation decrease "fitness"? | harmful |
| Which type of mutation could lead to extinction? | harmful |
| Which type of mutation increases an organism's chance for survival? | beneficial |
| Which has no effect on "fitness"? | neutral |
| Which body systems primary functions the continuation of the species? | reproductive |
| Where are a sequence of bases in a strand found? | DNA |
| What is a change in the bases of DNA? | mutation |
| When a mutation occurs, they will change the amino acids resulting in different __________ being created. | proteins |
| Changes in proteins will result in a change tot he organism's ______. | traits |
| What do animals compete for? | water, shelter, food, space |
| A physical or behavioral characteristic that is inherited and helps an organism survive and reproduce is _____. | Adaptation |
| What is a mutagen? | physical or chemical agents that changes the genetic material |
| What is gene therapy? | techniques developed to replace mutated genes |
| What are environmental factors that affect living organisms? | soil, temperature, space, food, light, wind, minerals |
| What are genetic factors that affect living organisms? | color variation, personality, body structure, hybrid, disease |
| What are the reproductive structures of conifers? | cones |
| What does a gene mutation affect in a cell? | production of proteins |
Created by:
LOJH8SCI
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