| 释义 |
Definition of bivalve in English: bivalvenoun ˈbʌɪvalvˈbaɪˌvælv An aquatic mollusc which has a compressed body enclosed within a hinged shell, such as oysters, mussels, and scallops. Class Bivalvia (formerly Pelecypoda or Lamellibranchia) Also called pelecypod or lamellibranch Example sentencesExamples - Many bivalves (such as clams or oysters) are used as food in places all over the world.
- Some sponges bore into the shells of bivalves, gastropods, and the colonial skeletons of corals by slowly etching away chips of calcareous material.
- Marine invertebrates include ammonites, echinoderms, bivalves and crustaceans, but infaunal elements are rare.
- It was thought that this behavior was an adaptation for desiccation resistance analogous to the closed shells of bivalves.
- Freshwater bivalves, snails, and branchiopod Crustacea were common.
- There is no evidence for trans-Panthalassan dispersal of bivalves in low latitudes within the interval of Ladinian coral beds.
- Notable is the relative rarity of bivalves and gastropods, consistent with a deeper water environment.
- Many bivalves and brachiopods possess multilayered shells.
- Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian.
- Finally, there was disagreement over how many major subdivisions were recognized within the bivalves.
- A bivalve closes its shells by contracting its powerful adductor muscles.
- This pattern was documented for both bivalves and gastropods and continued from the mid to late Paleocene until the early Eocene.
- Despite their unusual features, it is generally believed that the closest relatives of scaphopods are the bivalves.
- Most shells were bivalves, especially clams and some mussels.
- Mussels, like other bivalves, obtain all their nutrients - including iron - by filtering them from the water.
- Many modern gastropods and bivalves respond to increased temperature by increasing both shell and soft tissue growth rates.
- Both species of crayfish readily ate native bivalves.
- However, early calapids in the Cretaceous were smaller in size and are not considered as major predators of bivalves and gastropods.
- Shell fragments of bivalves and gastropods are common in Neogene shallow-water deposits.
- As in most bivalves, the shell is composed of three layers: the periostracum, the prismatic layer, and the nacre.
adjective ˈbʌɪvalvˈbaɪˌvælv 1(of a mollusc or other aquatic invertebrate) having a hinged double shell. Example sentencesExamples - This type of ornamentation is often found in crustaceans including Daphnia, many species of ostracodes, and other Cambrian bivalved arthropods such as Isoxys.
- These and other studies from native habitats have demonstrated that green crabs have a broad diet range, but that bivalve molluscs generally make up the largest part of their diet.
- Other species take refuge in a protective structure surrounding their body, such as polychaete tubeworms, caddis fly larvae, gastropod and bivalve mollusks, hermit crabs, barnacles, turtles, and armadillos.
- One of these is the bivalves (sometimes called pelecypods or lamellibranchs), an important group of bivalved molluscs familiar to all from the numerous shells that litter beaches.
- The smaller waders will feed on the bivalve molluscs and the little worms and that that are actually in the mud and sand.
- The only bivalve group having comparable hinge features is the Philobryidae (Arcoida, Limopsoidea).
- The beach sands are dominated by shells of bivalve mollusks, mainly venerids, gastropods, and echinoderms.
- The hinge ligament of bivalve shell is an example of a complex development.
- Generally fast-growing bivalved molluscs originated in near-shore environments, and later joined slower growing brachiopods offshore.
- Many suspension-feeding marine bivalve molluscs live in variable environments such as estuaries and shallow coastal waters.
- In many bivalve shells, growth lines become closely spaced in the late growth stage, accompanied by prominent shell inflation and thickening of the shell.
- Bradoriids are small bivalved arthropods, historically considered to be the oldest members of the Ostracoda.
- We continue to use these techniques for the isolation of new genes involved in physiological processes in fish and bivalve molluscs.
- In bivalve molluscs, growth rate of the shell tends to decelerate with growth and the shell generally becomes more inflated in the late growth stage.
- Sea urchins, like bivalve molluscs, are cosmopolitan in their distribution and by selecting a range of species a regular supply of gametes can be obtained for laboratory testing purposes.
- Thus, they are mechanically much weaker than other bivalve shells and are easily fragmented after break-down of the organic matter.
- Additional studies are required to resolve questions of vitellogenin regulation and the role of estrogens in bivalve molluscs.
- However, as early as 1923 Collip reported finding insulin-like activity in a bivalve mollusc, Mya arenaria.
- This makes brachiopods look superficially like bivalved molluscs (clams, oysters, etc.)
- Large, relatively well-preserved bivalve shells, rhodoliths and nodular bryozoans (several centimetres in size) occur together with volcanic pebbles, at the front of the landward-dipping beds.
2Botany
Having two valves. Example sentencesExamples - There is a large class of plants which have their seeds enclosed in a sort of bivalve pericarp, usually called a "pod."
- The bean seed grows in a bivalve pod called a legume.
- The soybean plant is called a legume because it produces a bivalve pod or fruit.
Definition of bivalve in US English: bivalvenounˈbaɪˌvælvˈbīˌvalv An aquatic mollusk that has a compressed body enclosed within a hinged shell, such as oysters, clams, mussels, and scallops. Class Bivalvia (formerly Pelecypoda or Lamellibranchia) Also called pelecypod or lamellibranch Example sentencesExamples - Many bivalves and brachiopods possess multilayered shells.
- This pattern was documented for both bivalves and gastropods and continued from the mid to late Paleocene until the early Eocene.
- A bivalve closes its shells by contracting its powerful adductor muscles.
- Despite their unusual features, it is generally believed that the closest relatives of scaphopods are the bivalves.
- Many bivalves (such as clams or oysters) are used as food in places all over the world.
- Marine invertebrates include ammonites, echinoderms, bivalves and crustaceans, but infaunal elements are rare.
- Based on gastropods, bivalves, and planktonic foraminifera, Kilmer assigned this formation to the Turonian.
- Many modern gastropods and bivalves respond to increased temperature by increasing both shell and soft tissue growth rates.
- Mussels, like other bivalves, obtain all their nutrients - including iron - by filtering them from the water.
- It was thought that this behavior was an adaptation for desiccation resistance analogous to the closed shells of bivalves.
- Shell fragments of bivalves and gastropods are common in Neogene shallow-water deposits.
- Both species of crayfish readily ate native bivalves.
- There is no evidence for trans-Panthalassan dispersal of bivalves in low latitudes within the interval of Ladinian coral beds.
- Finally, there was disagreement over how many major subdivisions were recognized within the bivalves.
- As in most bivalves, the shell is composed of three layers: the periostracum, the prismatic layer, and the nacre.
- Most shells were bivalves, especially clams and some mussels.
- However, early calapids in the Cretaceous were smaller in size and are not considered as major predators of bivalves and gastropods.
- Some sponges bore into the shells of bivalves, gastropods, and the colonial skeletons of corals by slowly etching away chips of calcareous material.
- Notable is the relative rarity of bivalves and gastropods, consistent with a deeper water environment.
- Freshwater bivalves, snails, and branchiopod Crustacea were common.
adjectiveˈbaɪˌvælvˈbīˌvalv Zoology 1(of a mollusk or other aquatic invertebrate) with a hinged shell. Example sentencesExamples - Other species take refuge in a protective structure surrounding their body, such as polychaete tubeworms, caddis fly larvae, gastropod and bivalve mollusks, hermit crabs, barnacles, turtles, and armadillos.
- We continue to use these techniques for the isolation of new genes involved in physiological processes in fish and bivalve molluscs.
- Large, relatively well-preserved bivalve shells, rhodoliths and nodular bryozoans (several centimetres in size) occur together with volcanic pebbles, at the front of the landward-dipping beds.
- However, as early as 1923 Collip reported finding insulin-like activity in a bivalve mollusc, Mya arenaria.
- The only bivalve group having comparable hinge features is the Philobryidae (Arcoida, Limopsoidea).
- These and other studies from native habitats have demonstrated that green crabs have a broad diet range, but that bivalve molluscs generally make up the largest part of their diet.
- Thus, they are mechanically much weaker than other bivalve shells and are easily fragmented after break-down of the organic matter.
- This makes brachiopods look superficially like bivalved molluscs (clams, oysters, etc.)
- Generally fast-growing bivalved molluscs originated in near-shore environments, and later joined slower growing brachiopods offshore.
- This type of ornamentation is often found in crustaceans including Daphnia, many species of ostracodes, and other Cambrian bivalved arthropods such as Isoxys.
- The smaller waders will feed on the bivalve molluscs and the little worms and that that are actually in the mud and sand.
- Additional studies are required to resolve questions of vitellogenin regulation and the role of estrogens in bivalve molluscs.
- Many suspension-feeding marine bivalve molluscs live in variable environments such as estuaries and shallow coastal waters.
- Bradoriids are small bivalved arthropods, historically considered to be the oldest members of the Ostracoda.
- One of these is the bivalves (sometimes called pelecypods or lamellibranchs), an important group of bivalved molluscs familiar to all from the numerous shells that litter beaches.
- The hinge ligament of bivalve shell is an example of a complex development.
- Sea urchins, like bivalve molluscs, are cosmopolitan in their distribution and by selecting a range of species a regular supply of gametes can be obtained for laboratory testing purposes.
- The beach sands are dominated by shells of bivalve mollusks, mainly venerids, gastropods, and echinoderms.
- In many bivalve shells, growth lines become closely spaced in the late growth stage, accompanied by prominent shell inflation and thickening of the shell.
- In bivalve molluscs, growth rate of the shell tends to decelerate with growth and the shell generally becomes more inflated in the late growth stage.
- 1.1Botany Having two valves.
Example sentencesExamples - There is a large class of plants which have their seeds enclosed in a sort of bivalve pericarp, usually called a "pod."
- The bean seed grows in a bivalve pod called a legume.
- The soybean plant is called a legume because it produces a bivalve pod or fruit.
|