Which Superkingdom contains members that are responsible for forming red tides?

Which Superkingdom contains members that are responsible for forming red tides?

Choanoflagellates

Are diatoms unicellular or multicellular?

Diatoms are unicellular: they occur either as solitary cells or in colonies, which can take the shape of ribbons, fans, zigzags, or stars. Individual cells range in size from 2 to 200 micrometers.

Where did eukaryotic cells come from?

The hypothesis that eukaryotic cells evolved from a symbiotic association of prokaryotes—endosymbiosis—is particularly well supported by studies of mitochondria and chloroplasts, which are thought to have evolved from bacteria living in large cells.

What was the first cell on earth?

That one cell is called the Last Universal Common Ancestor, or LUCA. It probably existed around 3.5 billion years ago. LUCA was one of the earliest prokaryotic cells. It would have lacked a nucleus and other membrane-bound organelles.

Which was the first eukaryote?

Protists are eukaryotes that first appeared approximately 2 billion years ago with the rise of atmospheric oxygen levels.

What are the 2 types of cell?

Cells are of two types: eukaryotic, which contain a nucleus, and prokaryotic, which do not. Prokaryotes are single-celled organisms, while eukaryotes can be either single-celled or multicellular.

What is the smallest type of cell?

Mycoplasma

What are the 3 main types of cells?

Cell Types

• Stem cells. Stem cells are cells that are yet to choose what they are going to become.
• Bone cells. There are at least three primary types of bone cell:
• Blood cells. There are three major types of blood cell:
• Muscle cells.
• Sperm cells.
• Female egg cell.
• Fat cells.
• Nerve cells.

Does the human body change every 7 years?

Here’s how the story goes: Every seven years (or 10, depending on which story you hear) we become essentially new people, because in that time, every cell in your body has been replaced by a new cell. There’s nothing special or significant about a seven-year cycle, since cells are dying and being replaced all the time.

Which is the largest cell in human body?

ovum

Who named the brain?

An old etymologist, a student of German, derived Bregen (the German cognate of brain) from Brei “mush, paste; porridge.” The derivation is wrong, but the idea is sound. In the remote past, people had no notion what function the brain has in the human organism. They saw “mush” and called it accordingly.

Is brain made of muscle?

New research shows that the brain is more like a muscle – it changes and gets stronger when you use it. Scientists have been able to show how the brain grows and gets stronger when you learn. Everyone knows that when you lift weights, your muscles get bigger and you get stronger.