Protists

One piece of evidence supporting the idea that poriferans evolved from protists is the similarity in genetic sequences between certain protists and sponges. Additionally, some protists share characteristics with poriferans, such as the presence of collar cells, which suggests a possible evolutionary relationship between the two groups. Studies of early fossil records also provide some evidence of a transitional form between protists and sponges.

Dinoflagellates glow through a phenomenon known as bioluminescence. This is triggered by movement or disturbances in the water, which activate a chemical reaction involving a light-emitting molecule called luciferin and an enzyme called luciferase within the dinoflagellates' cells. This reaction produces a blue-green light visible as a shimmering glow in the water.

Osmosis and diffusion help an amoeba survive by allowing it to take in essential nutrients and water from its environment and release waste products. Through these processes, the amoeba is able to maintain the necessary balance of molecules and ions inside its cell to support its biological functions.

Regulation in unicellular protists refers to the ability of these organisms to maintain internal stability despite changes in their external environment. This may involve processes like osmoregulation to control water balance, thermoregulation to maintain proper temperature, or pH regulation to manage acidity levels. Regulation mechanisms enable unicellular protists to survive and function effectively in different environmental conditions.

Amoebas play a crucial role in the ecosystem as they are important decomposers, breaking down organic matter and recycling nutrients. They are also a food source for many organisms, contributing to the food chain. Additionally, studying amoebas helps researchers understand cell biology and evolution.

yes.. i think there are a few because a saw a very quick one in science class today when a put a drop of water on my slide for the microscope.

A paramecium obtains nutrition through a process called phagocytosis, where it engulfs food particles along with water into its oral groove. The food particles are then enclosed in a food vacuole, where enzymes break them down for digestion. Waste materials are expelled through a structure called the anal pore.

Algae can be green, red, brown, or yellow depending on their pigments. Green algae, for example, contain chlorophyll for photosynthesis, while red algae contain phycoerythrin and phycocyanin pigments in addition to chlorophyll. Brown algae possess fucoxanthin pigments.

Yes, protists contain ribosomes which are responsible for protein synthesis within the cell. Ribosomes are found in the cytoplasm of protist cells and play a crucial role in producing proteins necessary for cell function.

Sarcodines, such as amoebas, obtain food through phagocytosis. They use their pseudopods to surround and engulf food particles or other organisms. Once surrounded, the food is taken into a food vacuole for digestion.

Diatoms are stramenophila algae, their cell wall is composed of silica and their chloroplasts are yellowish-brown. Desmids are green algae, their cell wall is composed of cellulose and pectins (like plants), and their chloroplasts are green.

The seven diatomic elements are:

Hydrogen

Nitrogen

Oxygen

Fluorine

Chlorine

Iodine

Bromine

They are nonmetals.

Yes, many species of amoeba have a contractile vacuole that helps regulate water content within the cell by expelling excess water to prevent bursting due to osmotic pressure.

Blepharisma is a unicellular organism. It belongs to the group of ciliate protozoans and has a single cell that carries out all necessary functions for its survival.

No, zooplankton are not protists. Zooplankton are a diverse group of small animals that drift in aquatic environments, while protists are eukaryotic microorganisms that can be both single-celled or multicellular, but are not classified as animals.

diatoms are free living.

they are also called "floating pastures of the sea".

they are one of the only organisms which are autotrophs.

In some protists, food is digested in specialized structures called food vacuoles. These vacuoles contain enzymes that break down the ingested food into smaller molecules that can be absorbed by the cell for energy. Once digestion is complete, the remaining waste is expelled from the cell.

Yes, all halogens are diatomic molecules in their elemental form, meaning that they exist as pairs of atoms bonded together. Examples of halogens include fluorine (F2), chlorine (Cl2), bromine (Br2), iodine (I2), and astatine (At2).

Yes. They are one-celled algae with two flagella.

Amoeba are eukariyotic cells.So they have mitochondria.

Paramecium in canal water serve as a food source for larger organisms like fish and invertebrates. They also help regulate the population of bacteria and algae through grazing, contributing to the overall balance of the aquatic ecosystem.

These protists share many characteristivd with Fungi. However, because of their differences from Fungi they are classified as protists. Funguslike protists play a valuable role in the ecosystem. They break down dead plant and animal matter, making the nutrients from these dead orgainsms available for living organisms. While some slime molds and water molds are benefical, many others can be very harmful. Many fuguslike protsts attack and consume living plants.

The typical lifespan of phytoplankton is 1 - 5 days. This is largely dependent on water temperature, light, and nutrients. More recently water pollution has been a factor decreasing their lifespan.

Diatomic molecules are two atoms of the same element that are bound together in their natural state. They are: hydrogen (H2), nitrogen (N2), oxygen (O2), and the halides, or halogens, in the next-to-last column of the period table, flourine (F2), chlorine (Cl2), bromine (Br2), iodine (I2), and astatine (At2).

Amoebas move by using structures called pseudopods, which are temporary protrusions of their cell membrane that form in the direction they want to move. They extend and contract these pseudopods to push themselves forward in a process known as amoeboid movement.