TKA 7TH GRADE ~ LIFE SCIENCE 2ND QUARTER EXAM
i just saved you a lot of time ~SOME TERMS MAY BE INCORRECT~
Terms in this set (62)
types of human blood
A, B, AB, O
study of genetics
the study of how traits pass from parent to offspring
Austrian monk who preformed experiments (such as cross pollination) on pea plants in the 1850's that helped answer questions about how traits are inherited.
section on a chromosome that has genetic information for one trait
when two alleles of a gene are the same, this is the genotype
when two alleles of a gene are diffrent, this is the genotype
model used to predict possible genotypes and phenotypes of the offspring - determines percentages
T - a genetic factor that blocks out another genetic factor
t - a genetic factor that is blocked by the presence of a dominant factor
when the pollen from one plant lands on the pistil of a flower on the same plant
true breeding plant
produces offspring with traits that match the parent plant
inside every cell is the nucleus that contains threadlike structures called this
two diffrent varieties or breeds
different forms of a gene - 2 for each trait
how the allele is expressed or appears
two alleles that control the phenotype
when someone is able to select which plants pollinated other plants
occurs when multiple genes determine the phenotype of a trait - eye color
microscopic prokaryotes that live on almost every continent in the world - 5,000 species
a thick covering around cells that make them immune to antibiotics and helps to keep the cell from drying out.
unicellular organisms that do not have a nucleus or other membrane bound organelles
many bacteria have capsules with hairlike structures called _______ that help the bacteria stick to surfaces
help move the bacterium
heats food to a temperature that kills most harmful bacteria - fruit juice / milk
these bacteria need oxygen
these bacteria do not need oxygen to survive
can harm your body in some way
medicines that stop the growth and reproduction of bacteria
can protect bacteria from intense heat, cold or drought
this process uses organisms (such as bacteria) to clean up environmental pollution
most bacteria are helpful - yogurt
asexual reproduction process that forms two genetically identical daughter cells
live in extreme places where bacteria can't - hot springs
a strand of DNA or RNA surrounded by a layer surrounded by a layer of protein that can infect and replicate in a host cell
4 shapes of viruses
what happens when a virus enters a host cell?
it either becomes active or latent
what happens during the replication of viruses?
virus inserts DNA into host cell. viruses replicate. burst out of cell and kills host cell.
how are some viruses beneficial?
are viruses alive?
do viruses stay the same?
no. they mutate constantly
what is a vaccine?
a mixture containing material from one or more deactivated pathogens, such as viruses. it triggers the production of antibodies.
cell wall, cloroplasts, provides food, 260,000 species. producers through photosynthesis
a type of vascular tissue that carries water and dissolved nutrients from the roots of the stems to the leaves
organisms that use an outside source (ex ~ sun) to make their own food
an organism that relies on something else for food
a waxy protective layer on their leaves, stems, and flowers
made of cellulose. protects cell
a plant that has vascular tissue
a plant that does not have vascular tissue
uses diffusion / osmosis in plants like mosses
bryophytes have rootlike structures called this which anchor it to a surface
this connects the leaves of a plant to the roots. makes new cells.
main site of photosynthesis
different shapes and sizes
non flowering cone bearing plants
pine tree - Christmas tree
wood for building
flowering plants - tulips
grow on all the worlds continents except Antarctica
these are gymnosperms
plants that grow, flower and produce seeds in one growing seasons
plants that grow, flower and produce seeds in two growing seasons
plants that grow, flower and produce seeds in 2+ growing seasons
have seeds with one cotyledon
3 petals per flower
have seeds with 2 cotyledons
4 / 5 petals for flowers
contains a tiny plant embryo and nutrition that the embryo uses to grow
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