1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Bas_tet [7]
3 years ago
9

What problems do biologists have with the kingdom Protista?

Biology
1 answer:
sp2606 [1]3 years ago
7 0
Lynn Margulis and Karlene Schwartz, in their book The Five Kingdoms (W.H. Freeman, 1998), struggled heroically to justify the Protista (they preferred the term Protoctista) kingdom.  "Undulipodia (aka flagella) were present in common ancestors to all the phyla, even before mitochondria, given that the anaerobic archaeprotists bear them."  However, a sentence later they admit that "in some phyla, all members bear undulipodia, in other phyla, they are absent..."  It seems a shaky foundation on which to build a kingdom.  All human cells are fathered ultimately by sperm, which bear undulipodia, but no one has suggested that humans are therefore protists.
You might be interested in
Which is the correct order of the parts of a neuron?
lord [1]
Neuron is a cell of the nervous system that is involved in carrying of impulses between the nervous system and the rest of the body. There are three types of neurons namely; relay neuron, motor neuron and the sensory neuron. Neuron is made up of various parts that enhance is activity in transmission of impulses/information which includes, dendrites, cell body, axon, myelin sheath among others. The conduction of information in the neuron starts from the Dendrites, then to the cell body, to axon and then to synapse where a neuron links with another and the process is repeated. Therefore; the correct answer is C
7 0
3 years ago
Read 2 more answers
How do you distingut algae from the
Eddi Din [679]

Answer:

Explanation:

Unlike fungi, which belong to the plant kingdom of taxonomy, algae fall under kingdom Protista.

Algae are primary producers, which means they  produce their own food through photosynthesis.

Algae reproduce only asexually.

Since they have no roots, stems, or leaves, algae cannot survive alone out of water.

Fungi feed on other organisms, sometimes alive.

Fungi reproduce both sexually and asexually.

:)

3 0
4 years ago
Which of the following is a biotic factor in an ecosystem
tigry1 [53]

Answer:  sunlight

Explanation:

8 0
3 years ago
Which is NOT true of the cell theory?
masha68 [24]

Answer:

All cells have a nucleus, which acts like the brain of the cell

Explanation:

prokaryotic cells don't have a nucleus

8 0
3 years ago
What most directly causes hypertension?
STatiana [176]

Stress and Salt cause Hypertensntion need to read more but I did read stress is a factor but salt is a known fact.

8 0
3 years ago
Other questions:
  • Which of the following statements about homologous chromosomes is likely true
    12·2 answers
  • In natural systems, nitrogen is lost by denitrification. Predict which of the following processes will be most responsible for r
    9·2 answers
  • Which of the following is not true of mutations?
    9·1 answer
  • What are the classes of crayfish,crabs,scorpions,lobsters?
    12·2 answers
  • Overpopulation impacts the environment primarily by
    12·2 answers
  • Air always moves from pressure to pressure
    8·1 answer
  • HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP HELP I NEED HELP ASAP
    9·2 answers
  • What would happen to a species if it was quickly moved from a familiar environment to an extremely different environment.
    14·1 answer
  • Blood type has a transmission type called___
    9·1 answer
  • Does a person in need of an organ transplant have a moral right to obtain that transplant, supposing the availability of the nee
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!