Why are protists considered a paraphyletic group quizlet?
Why are protists considered a paraphyletic group quizlet?
Why are protists considered paraphyletic? They include some but not all descendants of their most recent common ancestor.
Why are protists considered Polyphyletic?
Protists are considered as polyphyletic group of organisms as their origin is not from a common ancestors. They are probably considered as first living organisms on earth. These protists are considered as polyphyletic group of organisms as their emergence is not from a similar ancestor.
Are protists monophyletic or Polyphyletic?
Why? “ ‘Kingdom Protista’ is not monophyletic; it contains organisms which are more closely related to members of other kingdoms than they are to other protists.
What are four examples of Plantlike protists?
red, yellow-brown, green, and blue-green. -Other types of plantlike protists are diatoms, dinoflagellates, and euglenoids.
Which protists are most like plant cells?
Seaweed and kelp are examples of multicellular, plant-like protists. Kelp can be as large as trees and form a “forest” in the ocean (Figure below). Plant-like protists are essential to the ecosystem. They are the base of the marine food chain, and they produce oxygen through photosynthesis for animals to breathe.
Is kelp a plant or a protist?
Kelp is like a plant – it is photosynthetic and has structures that look like roots (the kelp holdfast), stems (the stipe) and leaves (blades)– but kelp and other algae belong to a separate kingdom of life from plants, called protists.
What is another name for animal like protists?
Animal like protists are single-celled consumers. Animal-like protists are also known as Protozoa.
What animal-like protists cause disease?
Animal-like protists cause many human diseases. Ameboid dysentery, malaria, giardiasis, tryptosomiasis, and Trichomoniasis are all diseases caused by protozoa. The malaria parasite requires two hosts: humans and mosquitoes.
Are protists harmful or helpful?
Many protists are harmful to humans, other animals and plants because they cause diseases and crop failures. However, some protists are actually beneficial to other creatures and are used by humans for various purposes.
Are all protists dangerous?
How do most protists maintain water balance?
-Protists maintain water balance with the contractile vacuole, which collects water entering the cell via diffusion, and once filled, contracts and discharges water through pores.
How is the Volvox different from the other protists?
Volvox are protists that live in colonies, or groups of organisms living together. They are both autotrophs and heterotrophs. They use their eyespot to detect light when they undergo photosynthesis. They also have tails, or flagella, they use to move the colony.
How do freshwater protists Osmoregulate?
Freshwater protists like a paramecium are osmoregulators. They expel excess water by means of a contractile vacuole. As we’ll see, they need to prevent water loss from their cells. No matter what the environment, osmoregulation depends upon active transport across cell membranes.