Web15 apr. 2024 · Mollusks often have a hard outer shell to protect their bodies. All mollusks have a thin layer of tissue called a mantle which covers their internal organs. The mantle produces the mollusk’s shell. Which characteristic do all mollusks have Which characteristic do all mollusks have? All mollusks have a visceral mass, a mantle, and … WebIt doesn't have joints like the exoskeletons of insects and crustaceans . There are almost 100,000 species of mollusks around the world, and many tens of thousands more …

Phylum Mollusca Biology for Majors II - Lumen Learning

WebVerified answer. engineering. An aluminum Z Z section has the dimensions shown in Fig. The yield strength (tension or compression) of the aluminum is \sigma_Y=40 \mathrm … graco rightguide booster

How many legs do molluscs have? Explained by FAQ Blog

Mollusca is the second-largest phylum of invertebrate animals after the Arthropoda, the members of which are known as molluscs or mollusks . Around 85,000 extant species of molluscs are recognized. The number of fossil species is estimated between 60,000 and 100,000 additional species. The proportion of … Meer weergeven The words mollusc and mollusk are both derived from the French mollusque, which originated from the Latin molluscus, from mollis, soft. Molluscus was itself an adaptation of Aristotle's τὰ μαλάκια ta malákia (the … Meer weergeven Because of the great range of anatomical diversity among molluscs, many textbooks start the subject of molluscan anatomy by describing what is called an archi-mollusc, hypothetical generalized mollusc, or hypothetical ancestral mollusc (HAM) to illustrate the … Meer weergeven Opinions vary about the number of classes of molluscs; for example, the table below shows seven living classes, and two extinct ones. Although they are unlikely to form a … Meer weergeven The most universal features of the body structure of molluscs are a mantle with a significant cavity used for breathing and excretion, and the organization of the nervous … Meer weergeven Estimates of accepted described living species of molluscs vary from 50,000 to a maximum of 120,000 species. The total number of described species is difficult to estimate because of unresolved synonymy. In 1969 David Nicol estimated the probable … Meer weergeven Feeding Most molluscs are herbivorous, grazing on algae or filter feeders. For those grazing, two feeding strategies are predominant. Some feed … Meer weergeven Fossil record Good evidence exists for the appearance of gastropods (e.g., Aldanella), cephalopods (e.g., Plectronoceras, Nectocaris) and bivalves (Pojetaia, Fordilla) towards the middle of the Cambrian period, c. 500 million years ago, … Meer weergeven http://oceanicresearch.org/education/wonders/mollusk.html WebVerified answer. engineering. The steel shafts are connected together using a fillet weld as shown. Determine the average shear stress in the weld along section a-a a−a if the torque applied to the shafts is T=60 \mathrm {~N} \cdot \mathrm {m} T =60 N⋅m. Note: The critical section where the weld fails is along section a-a a−a. chilly background