Invertebrates

Adulthood is typically considered to begin at the age of 18 in many cultures, as this is when individuals are legally recognized as adults and gain certain rights and responsibilities, such as the ability to vote and sign contracts. However, the transition to adulthood is a complex process that may involve social, emotional, and cognitive development as well.

Structures such as flat shape bristles or spines increase the surface area of diatoms, providing more buoyancy and preventing them from sinking. This increased surface area allows them to capture more light for photosynthesis, helping them stay afloat in the upper, sunlit regions of the water column. Additionally, these structures also reduce drag, allowing diatoms to maintain their position in the photosynthetic zone.

No, a free swimming form of a cnidarian is called a medusa. Polyps are typically attached to a substrate and have a cylindrical body with a mouth surrounded by tentacles at one end. Medusae have a bell-shaped body with tentacles hanging down.

No, diatoms are not parasitic. They are single-celled algae that are primarily photosynthetic, meaning they make their own food using sunlight. They play an important role in marine and freshwater ecosystems as primary producers.

Some animals that are found in the phylum Cnidaria are corals, sea anemones, and jellyfish. Cnidarians are characterized by the presence of cnidocytes, or specialized stinging cells, with which the invertebrates can capture their prey. They are radially symmetrical and have two cell layers. All cnidarians are aquatic, and the majority are also marine.

Cnidarians do not have a centralized digestive system like other animals. They capture small prey using tentacles armed with stinging cells called cnidocytes. Once caught, the prey is pushed into a central cavity where digestion occurs. The nutrients are then absorbed through the body wall.

The tiny exoskeleton of a diatom is mostly composed of silica, which is a form of silicon dioxide. This silica shell gives diatoms their characteristic glass-like appearance and provides protection for the cell inside.

No, diatoms are not found in glass. Diatoms are actually microscopic algae that are encased in a cell wall made of silica. Glass, on the other hand, is produced through melting sand and other materials at high temperatures to create a transparent, solid material.

Pennate diatoms have elongated, bilaterally symmetrical cells with a slit-like opening, while centric diatoms are circular or oval in shape with radial symmetry. Pennate diatoms are typically found in benthic habitats, while centric diatoms are more common in planktonic environments.

Animals in the sponge group, known as phylum Porifera, include various species of sponges such as sea sponges, glass sponges, and demosponges. These animals are multicellular but lack true tissues and organs, with specialized cells performing different functions within their bodies. Sponges are filter feeders that live in aquatic environments, ranging from freshwater to marine habitats.

Giardia is a common protist found in natural streams and bodies of water near wild animal habitats. It can be spread through contaminated water sources and can cause gastrointestinal illness in humans and animals if ingested.

Diatoms are primarily found in the sunlit zone of the ocean, also known as the euphotic zone. This zone receives enough sunlight for photosynthesis to occur, which is essential for diatoms as they are photosynthetic organisms. They are most abundant in surface waters where sunlight penetration is optimal.

Invertebrates are successful in the ocean because of their wide diversity of body forms and strategies that have evolved over millions of years. This diversity allows them to occupy a wide range of ecological niches and adapt to different environmental conditions, making them resilient and able to thrive in various marine habitats. Additionally, their reproductive efficiency, high population numbers and ability to quickly colonize new habitats contribute to their success in the ocean.

When diatoms die, their shells are called frustules. These microscopic structures are made of silica and can accumulate in large numbers on the ocean floor, forming sediment known as diatomaceous earth.

Mollusks have a mantle, which is a thin layer of tissue that covers their body and secretes the shell in shelled mollusks. The mantle plays a key role in respiration, excretion, and shell formation in mollusks.

Many aquatic organisms consume diatoms. Diatoms are an important type of primary producer in marine and freshwater systems and are a type of algae. In marine systems, many zooplankton and some small fish consume diatoms.

Diatoms are microscopic algae that are not typically consumed by humans as a direct food source. However, some marine organisms such as certain species of zooplankton and small fish do consume diatoms as part of their diet.

zooflagellates are more animal-like flagellates (eg, triconympha that live in the digestive tract of termites), and dinoflagellates are more plant-like flagellates (phytoflagellates) - Autotrophic organisms.

the ground-up diatoms are added to cleansers because they are hard and don't scratch any surface.

Yes, anemones are carnivorous animals. They capture their prey using their stinging tentacles and then consume them by pushing the prey into their mouth located at the center of their body. Their diet typically consists of small fish, crustaceans, and plankton.

The fastest invertebrate is the common squid, which can reach speeds of up to 25 miles per hour (40 kilometers per hour). This remarkable speed is achieved through jet propulsion, where the squid expels water from its funnel to propel itself forward rapidly.

The basic purpose of internal skeleton is to provide place for attachment of muscles. The internal skeleton protects the essential organs like heart and lungs (rib cage). The backbone gives flexibility to move. The girdles support the limbs. The skull protects our brain. All evolved in course of time to meet the demands of animal encounter with the environmental conditions.

Both predator and prey as with most animals in this world.

fast running rivers! there so many leeches there!