What category is a starfish in?
class Asteroidea
What is the classification of sea anemone?
Sea anemones and corals
What are the 3 types of marine life?
Three main groups of ocean life are plankton, nekton, and benthos.
Where do starfish belong?
Echinoderms are “spiny-skinned” invertebrate animals that live only in marine environments.
Is a starfish living or nonliving?
Reproduction Starfish reproduce sexually and lay eggs. Sensitivity Starfish detect there environment and react to changes in it. So, as starfish carry out all seven of the above they are indeed living things…
Is a starfish biotic?
Starfish (Asteroidea) Abiotic; The abiotic factors for starfish are sunlight, temperature, water currents/tides, nutrients, and oxygen. Biotic; The biotic factors for starfish are clams, oysters, algae, crab larvae, sea urchins, and sponge tissue.
What is a once living thing?
Once living things are objects that used to be alive, but now are not. For example, dried flowers, a dead insect, and a fossil would all be examples of once living objects.
Is a virus a life form?
Viruses are considered by some biologists to be a life form, because they carry genetic material, reproduce, and evolve through natural selection, although they lack the key characteristics, such as cell structure, that are generally considered necessary criteria for defining life.
What is the largest virus?
Mimivirus is the largest and most complex virus known.
What is the smallest virus?
For the first time – scientists have detected one of the smallest known viruses, known as MS2. They can even measure its size – about 27 nanometers. For comparison’s sake, about four thousand MS2 viruses lined side-by-side are equal to the width of an average strand of human hair.
What are the 2 main parts of a virus?
The simplest virions consist of two basic components: nucleic acid (single- or double-stranded RNA or DNA) and a protein coat, the capsid, which functions as a shell to protect the viral genome from nucleases and which during infection attaches the virion to specific receptors exposed on the prospective host cell.
What are 5 diseases caused by viruses?
What are viral diseases?
- Chickenpox.
- Flu (influenza)
- Herpes.
- Human immunodeficiency virus (HIV/AIDS)
- Human papillomavirus (HPV)
- Infectious mononucleosis.
- Mumps, measles and rubella.
- Shingles.
Why do viruses not grow?
Viruses lack essential machinery needed to reproduce by themselves. In fact, viruses can only reproduce after infecting a living cell – a process called viral replication. Once inside a living cell, viruses re-program the cell’s machinery to produce viral proteins and genetic material to make new copies of themselves.
Which viruses are DNA viruses?
DNA viruses comprise important pathogens such as herpesviruses, smallpox viruses, adenoviruses, and papillomaviruses, among many others.