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tests of shelled amoebas are made from a variety of substances including sand grains chitin and substrate calcium salts and even silica these shells
sarcodine protozoans are amoebas and there are two types of them shelled and naked as you examine the prepared slides you should be able to see water
in protozoans flagella are found always one per cell flagella and cilia can generate substantial force as they try to push or pull a protozoan
cilia and flagella share a common structure with a microtubular core which has a 92 organization with nine paired doublets of microtubules
protozoans ingest food by phagocytosis and consequently the ingested food is surrounded by a plasma membrane creating a food vacuole or phagosome
the water expulsion vesicle also known as a contractile vesicle is an important osmoregulatory organelle in freshwater protists which are
the nucleus comprise the genetic information of cell in addition to activities which maintain the cell nucleus creates copies of itself for new
movement is even controlled by organelles cilia and flagella these and the pseudopodia in the amoebas give these small creatures movement something
protozoans have endoskeletons formed from microtubular cytoskeleton of the exoskeletons or cytoplasm secreted as shells or tests some of these
mitochondria which fuel lifes processes in all cells uses nutrients from digested food and oxygen which has diffused across cell surface in
in some protozoans food is always ingested at the same place on cell surface cytostome cell mouth undigested food is removed at a cytoproct or cell
similar to all animal cells protozoans are covered by a plasma membrane which surrounds cytoplasm of the cell protozoans integument or skin like all
protozoans are microscopic in size however some are large enough to be seen with naked eye microscopic organisms such as these have numerous
single-cell organisms protists have always been a problem for taxonomists who have trouble describing categories for organisms their mixed feeding
in a comparison of brain found in lower classes of vertebrates to the brain in higher classes of vertebrates area showing most increase in relative
from the following name the type of mimicry by which a palatable acceptable insect mimics an unfavorable noxious insec for protectiona batesian
if we were to completely eliminate one group of marine organisms from ocean which would most likely be fatal to marin fish populations elimination
which of the below terms describes study of animal behavior based on comparisons observation of patterns and consideration of environmental
which term is used to describe organisms that live on or in the bottom of an ocean or lake such organisms can be found anywhere from the shoreline to
in 1954 public health service organized an experiment in that nearly 2 million children in grades 1 2 and 3 participated experiment was to test a
which of the below is usually referred to as master gland because it regulates so many body activities is ita pituitary glandb thyroid glandc adrenal
in studies of human body which of the subsequent terms can also be used when referring to the pituitary gland is ita pancreasb hypozthesis pron
in studies of human body which of the below terms is used to describe the first step in production of urine is ita tubular reabsorptionb tubular
in studies of human body which of the below terms is used to describe hereditary condition associated with an excessively high level of uric acid in
in studies of human body which of the following terms will be used to explain the lack of voluntary control of urination or voiding of bladder is ita