MollusksIn this paper we review and analyze the chromatin condensation pattern during spermiogenesis in several species of mollusks. Previously, we had described the nuclear protein transitions during spermiogenesis in these species. The results of our study show two types of condensation pattern: simple...
Octopuses are soft-bodied marinemolluskswith eight legs. The 310 species of octopus (source) make up the orderOctopoda, which is part of a larger group of mollusks, the classCephalopoda. Other cephalopods includesquid,cuttlefishandnautiloids. Octopuses prey on a variety of animals, but the most ...
organs that have evolved. The liver and heart, for example, originated in chordates around 550-500 million years ago, while the stomach and brain (including the pineal gland) are even older, emerging in the progenitor of vertebrates, insects, mollusks, and worms around 700-650 million years ...
in turn, are made up of tissues that carry out a particular function. The tissues consist of cells that perform various metabolic activities. There are two major types of cells: somatic cells and sex cells (i.e.sperm cells and
Animal kingdom Evolution of life Simple organisms and ... Insects and arachnids Mollusks Crustaceans Fishes Amphibians Reptiles Birds Insectivorous mammals Rodents and lagomorp... Ungulate mammals Carnivorous mammals Marine mammals Primate mammals Flying mammal Marsupial mammals...
Examples of Cephalization Three groups of animals display a high degree of cephalization: vertebrates, arthropods, andcephalopodmollusks. Examples of vertebrates include humans, snakes, and birds. Examples of arthropods includelobsters, ants, and spiders. Examples of cephalopods include octopuses, squid, ...
There was some talk that day about how the mussels might affect native fisheries, but the scientists mostly worried about what the mollusks could do to the region's industries, given their ability to gum up pipes. Dan Egan, jsonline.com, 2 Sep. 2021 The initial suit was filed in early...
Pearl: Animal-based; Crystalline, organic mineraloid composed of concentric layers of calcium carbonate (nacre) and formed by certain mollusks when irritants get into its shell. Pumice: Glass; Lightweight, porous, volcanic glass formed when lava explodes out and the rapid decrease in temperature ...
Malacology:The study of mollusks. (snails, clams, and octopuses) Arachnology:The study of arachnids. (spiders, scorpions, and ticks) Herpetology:The study of amphibians andreptiles. (frogs, snakes, turtles, and lizards) Entomology:The study ofinsects. It has subgroups like: ...
(Kitching & Harmsen, 2008). An example of amensalism is the mussel beds and the various infaunal species that it harbors. Mussels are mollusks that can be rich hosts for several species of marine organisms. But, since the substrate (the mussels themselves) is also composed of living ...