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masya89 [10]
3 years ago
13

Summarize how the actions of the heartbeat make their first and second sounds.

Biology
1 answer:
professor190 [17]3 years ago
7 0
When the blood is pumped from the right ventricle to the pulmonary artery.. the "lubb" sound is heard... while ..when the oxygenated blood is pumped by the left ventricle to the aorta.. a larger "dubb" sound is heard... 
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Dr. Phillipi is writing an article to be published in the journal Psychological Science. At the beginning of her paper, she prov
Artemon [7]

The brief description of the project is called Abstract.

Option B.

<h3><u>Explanation:</u></h3>

An abstract is defined as a brief description of the project or content of an article, speech, or a book. An abstract is given at the beginning of the book or project to describe what's the topic of the project, what the project is going to prove, or to explain.

An introduction on the other hand is a description about the project topic, the prevailing idea, or explaining the topic of project.

A reference is described as the source from where the data of the project are collected or hints are taken.

A summary is the paragraph briefly describing the project conclusion at the end of the project, to briefly explain everything about the project.

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3 years ago
2.) Those that knew Randy stated he should not have gone treasure hunting because he had a premedical breathing
ella [17]
The answer would be respiratory. Because asthma affects your breathing which is what the respiratory system is used for. (Lungs)
5 0
3 years ago
Accoriding to the cell theory which best describes cells​
frosja888 [35]

Living organisms are not created spontaneously.

Explanation:

The cell is the basic and fundamental unit of life. Cells are the basis of the organization of life and on it, complexity is built.

The cell theory was formulated around the 17th century and there are some of its postulates:

  • The functioning and fundamental unit of life is the cell
  • All organisms are made up of one or more cells.
  • Cells are formed from pre-existing cells and are not created spontaneously.

Learn more:

Cell theory brainly.com/question/3256177

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8 0
3 years ago
Why are nonnative species a threat to biodiversity?
Svetlanka [38]
The answer is A.,.....................

7 0
4 years ago
Read 2 more answers
F. Why are there more producers in the world than top carnivores?
Rainbow [258]

Answer:

There is only enough food for a few top level consumers

Explanation:

The organisms that eat the producers are the primary consumers. They tend to be small in size and there are many of them. The primary consumers are herbivores (vegetarians). The organisms that eat the primary consumers are meat eaters (carnivores) and are called the secondary consumers. The secondary consumers tend to be larger and fewer in number. This continues on, all the way up to the top of the food chain. About 50% of the energy (possibly as much as 90%) in food is lost at each trophic level when an organism is eaten, so it is less efficient to be a higher order consumer than a primary consumer. Therefore, the energy transfer from one trophic level to the next, up the food chain, is like a pyramid; wider at the base and narrower at the top. Because of this inefficiency, there is only enough food for a few top level consumers, but there is lots of food for herbivores lower down on the food chain. There are fewer consumers than producers.

5 0
3 years ago
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