what two characteristics do foraminiferans and radiolarians share?
319383
Foraminiferans have a calcium carbonate shell, pseudopodia (which they use to capture and trap prey organisms), and a commonly benthic lifestyle. Radiolarians are planktonic, have silica skeletons, use pseudopodia just like foraminiferans, and are often spherical with spines.
859267
['Choanocytes.', 'Water canal (aquiferous) system.', 'Organic and inorganic skeletons.', 'Totipotency.', 'Plasticity.']
339844
Mastodon were shorter and stockier than mammoths with shorter, straighter tusks. Mastodons were wood browsers and their molars have pointed cones specially adapted for eating woody browse. Mammoths were grazers, their molars have flat surfaces for eating grass.
544615
['A hard exoskeleton made of calcium - no internal skeleton.', 'The head has two compound eyes, two pairs of antennae, and three pairs of mouthparts.', 'A pair of green glands excrete wastes near the base of antennae.', 'The abdominal segments have swimmerets (swimming legs)']
182710
Radiolarians are animal-like protists who, like diatoms, secrete siliceous skeletons. Unlike diatoms, though, radiolarians are exclusively marine and planktonic, and their shells tend to be better preserved.
1170134
['They are multicellular organisms which do not possess chlorophyll.', 'They are eukaryotic organisms.', 'Cell wall is absent.', 'Mode of nutrition is heterotrophic i.e. they depend on other organisms for food.']
1140484
Roundworms are more complex than cnidarians because roundworms have organs and organ systems, while cnidarians have only specialized tissues.
1165924
Today's knowledge of fossil ages comes primarily from radiometric dating, also known as radioactive dating. Radiometric dating relies on the properties of isotopes. These are chemical elements, like carbon or uranium, that are identical except for one key feature -- the number of neutrons in their nucleus.
890054
['Resemble bony fish and terrestrial vertebrates in having jaws and paired appendages.', 'An electroreceptive system is well developed.', 'Endoskeleton entirely cartilaginous.', 'No swim bladder or lung.']
244286
Because corals are sensitive to changes in light, temperature, water quality, and salinity, their fossils provide information that can be used to interpret climate and geography of past environments.
332617
Worms and spiders are more closely related. They have more traits in common. ... IT'S THE ORGANISMS WITH LEAST TRAITS IN COMMON AND FARTHEST IN THE CLADOGRAM.
995595
Members of the phylum Sarcodina are ameboid. They move about by using pseudopods and usually eat by phagocytosing food particles, usually bacteria. Some amoeba form calcium carbonate or silica skeletons called tests to protect themselves.
1051229
['They are eukaryotic, which means they have a nucleus.', 'Most have mitochondria.', 'They can be parasites.', 'They all prefer aquatic or moist environments.']
118871
Members of phylum Porifera, Coelenterata, Ctenophora, Platyhelminthes, Aschelminthes, Annelida, Arthropoda, Mollusca, Echinodermata and Hemichordata fall under Non-chordates. The general characteristic features of Non-Chordates are: They are cylindrical, triploblastic, coelomate, or pseudocoelomate animals.
411243
['They do not have a backbone.', 'They are multicellular. ... ', 'They have no cell walls, like all other animals.', 'They reproduce by two reproductive cells, or gametes, coming together to produce a new organism of their species.']
1097917
The main characteristics of unicellular organisms are as follows: They have asexual reproduction, so an organism can produce its descendants. They can be eukaryotes or prokaryotes. Their internal part is formed by a liquid different from their external environment that allows the realization of biological processes.
1373647
['They are widely distributed, aquatic or terrestrial, parasitic or free-living.', 'Their body is elongated, cylindrical, unsegmented, worm-like, bilaterally symmetrical and tapering at both ends.', 'They are triploblastic animals with perivisceral cavity more extensive than that of platyhelminths.']