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
BigorU [14]
3 years ago
14

Sam had a disease that weakened his heart so it could not pump properly. This heart problem

Biology
1 answer:
Kamila [148]3 years ago
6 0

Answer:

2.  muscular system and cardiovascular system

You might be interested in
What does Na+ represent? Select all that apply.
Dmitriy789 [7]
2. sodium ion that has lost an electron

3 0
3 years ago
Read 2 more answers
1. How do disturbances (or catastrophes) affect ecological succession? Be as specific as possible. Right answers only.
tino4ka555 [31]

Answer:

There are two types of ecological succession:

Primary succession:

Primary succession occurs in areas which were previously devoid of life. There were no organisms living in this area before. For example, lands after new glaciers or volcano  eruptions. Firstly, microorganisms begin to habitat this land, followed by plants like lichens, shrubs etc. Finally, complex life evolved from these.

Secondary succession:

Secondary succession arises in areas where life existed before but was destroyed due to natural circumstances like flood, fire etc. Small grasses inhabit this land first which are taken over by trees over  period of time.

3 0
3 years ago
Reciprocal altruism can be best explained with a model proposed by Robert Trivers in 1971. Trivers hypothesized that if one indi
Leni [432]

Answer:

Reciprocal altruism is one of the altruism behaviors in which an individual organism helps in increasing the fitness of another organism by reducing the fitness of itself temporarily in expectation of the same behavior from another organism in the future later.

It takes place in the same set of organism partners which is a continuous interaction ion in stable groups of organisms.

Thus, the correct answer would be - an ongoing interaction in the same set of partners.

6 0
3 years ago
Suppose you want to design and build a house how would you communicate your design plans with the construction crew that would w
lawyer [7]
First i would like to discuss the design with the head of the construction crew that are capable of understanding the engineering part, then ask him if the design is feasible, if its realistic, if it is safe to be house and if it is safe to work on by the workers. and it would be his task to deliver it the others
5 0
3 years ago
24. What is evidence for the endosymbiotic theory? (a) rna can catalyze metabolic reactions. (b) meteorites contain organic mole
ohaa [14]
I think it’s A but i’m not sure
4 0
2 years ago
Other questions:
  • Which scientific skill involves sharing what you have learned with others?
    12·2 answers
  • What Is An Example Ecosystem Of Fungi?
    11·1 answer
  • Victoria is comparing a plant cell to an animal cell under the microscope. Which of the following characteristics do plants and
    5·2 answers
  • 1. Disease can be caused by viruses, bacteria,
    7·1 answer
  • What forms between a positive and negative ion
    6·1 answer
  • (08.01 MC)
    9·2 answers
  • HElPPPpp ! I have to get this done before my picture day time-
    7·1 answer
  • Hello please help i’ll give brainliest
    12·1 answer
  • The community of a pond is made up of ?
    14·2 answers
  • In the example of the predator/prey web in the grassland community on Bylot Island, a rise in the snowy owl population would hav
    9·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!