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what do you understand by amphidunique to the nematodes these paired sensory structures are located on the sides of the head an external pore leads
determine the following term - amniote eggeggs that shelter the developing embryo in a water-filled sacmdashthe amnion characteristic of the amniote
express the term - amnionone of the extraembryonic membranes found in terrestrial vertebrate the amnion is filled with fluid and the developing
describe the term - ambulacral groovethe groove that runs down the oral surface of each echinoderm arm and contain the tube feet if the region
what is allantoisone of the extraembryonic eggs found in the amniote animals the allantois contains the metabolic wastes created by the developing
what do you mean by advanced charactersthe traits or characteristics that an animal has that are not ancestral to the taxon they appear later in the
discuss the following term in brief - adaptive radiationevolution of a variety of different species from a single common ancestor each is adapted
define the term - acoelomatetriploblastic animals which do not have an internal body cavity this includes flatworms and ribbon worms however the term
what do you understand by term - acanthusthe egg and larval phase of an acanthocephalan which passes from the female parasite to the feces of
in radially symmetric animals there is no posterior or anterior right sides to the animal rather we refer to two sides of the animal by referring to
in organisms that have undergone tagmosisthe trunk often develops into two tagma oneinvolved in locomotion and one that is notlocomotory the tagma
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