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
borishaifa [10]
3 years ago
8

Many of the simple worms are parasitic. Since they developed before other animals in the evolutionary sequence, discuss how they

may have gone from free-living forms to their current parasitic ones.
Health
1 answer:
rosijanka [135]3 years ago
7 0

Answer:  The correct answer is :  Parasitism arises several million years ago. The evidence shows that the parasites were initially free-living organisms that had contact with their host and managed to adapt to the same biochemical and biophysical environment. There are three theories about the origin of parasitism and they are:

inoculation of the agent through arthropod vectors

ingestion of the "pre-parasite" by its host

active invasion by the same parasites

You may think that there was a nutritional dependence

You might be interested in
The rising and falling of the voice when one is speaking is called​
xxTIMURxx [149]
Intonation! Intonation is the rising and falling of the voice. Changes in intonation can be caused by emotion, accents, and other factors. I hope that helped!
6 0
3 years ago
Landon is living with an inoperable medical condition. His oncologist learned about an advanced form of therapy that could cure
emmainna [20.7K]
C - because its an experimental test and they need to collect all the data they can 
not positive but thats what i would do
4 0
3 years ago
Arrange the actions in order considering a parent is facing a time constraint. Her dad is about to leave for office at the time
stira [4]

Answer:

The correct order of the actions is:

Explanation:

1. Deborah asks her dad if she can talk to him for a few minutes.  

2. Her dad is about to leave for office at the time she asks him.  

3. He promises her that they will talk about it after school.

4. After school, dad picks up Deborah and waits for her to settle into the car.

5. Once relaxed, Deborah speaks to her dad about her concern on the way home.

7 0
3 years ago
How might glycemic index be used to help people achieve better control of their blood glucose ?
tigry1 [53]

Answer:

The glycemic index measures how much a food boosts blood sugar compared to pure glucose. A food with a glycemic index of 28 boosts blood sugar only 28% as much as pure glucose; one with a glycemic index of 100 acts just like pure glucose.

8 0
3 years ago
Which structure in your body is responsible for neural communication ?
Eva8 [605]

The brain contains many billions of neurons that work together to produce sensation, thought, learning and many other sensing and feeling type of processes.

Neurons use electrical signals to transmit information within a single cell and these unique functions have forced the neuron to adopt a cell structure.

Neurons comprise a cell body (or soma), dendrites, and an axon that ends at a terminal. Communication between neurons is a chemical process that uses neurotransmitters.

6 0
3 years ago
Other questions:
  • Supplies the body with 4 calories per gram
    15·1 answer
  • What is a gamete and what do gametes do during fertilization ?
    10·1 answer
  • To lose body fat you should do what?
    6·1 answer
  • Why is it important to weigh the risks of any action against its benefits.
    10·1 answer
  • List and explain three examples of how your body changes as it ages.
    13·1 answer
  • Every time you eat a meal you gain energy, what is the original source of this energy?
    13·2 answers
  • Why is it important to take responsibility<br> for your health and decisons.
    12·1 answer
  • Is this statement true or false?
    5·2 answers
  • OKAYYYY!!!! After this question I’m done help me out!!!
    11·1 answer
  • Who wants free brainulest
    14·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!