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Slav-nsk [51]
3 years ago
12

Compare and contrast vascular plants and non-vascular plants.

Biology
1 answer:
qwelly [4]3 years ago
6 0
Vascular plants have tube like structures that carry water, nutrients, and other substances throughout the plant. Nonvascular plants do not have these tube like structures and use other ways to move water and substances. ... Distinguish between characteristics of seedless non vascular and vascular plants.
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Using 3-5 sentences explain how electromagnectic work.
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Answer:

Explanation:

Electromagnets. Electromagnets are a different from permanent magnets. Electromagnets are made of coils of wire with electricity passing through them. Moving charges create magnetic fields, so when the coils of wire in an electromagnet have an electric current passing through them, the coils behave like a magnet.

3 0
2 years ago
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The smooth but steady increase in muscular tension that is produced by increasing the number of active motor units is called ___
Troyanec [42]

The smooth, but steady, increase in muscular tension produced by increasing the number of active motor units is called a recruitment.

Muscle tension is the force produced when a muscle contracts (or when sarcomeres shorten). The two primary forms of skeletal muscle contractions, isotonic contractions and isometric contractions, are produced when a muscle contracts against a load that is not moving.

  1. A load is transported as the length of the muscle varies during isotonic contractions, in which the tension in the muscle remains constant (shortens). Concentric and eccentric contractions are the two varieties of isotonic contractions.
  2. When a muscle contracts isometrically, the angle of a skeletal joint remains the same while tension is produced in the muscle. Sarcomeres shorten and muscles tense up during isometric contractions, but the load is not moved since the force generated is insufficient to overcome the resistance provided by the load.

To know more about muscle tension click here

brainly.com/question/2794358

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3 0
2 years ago
Which molecules of the adaptive defense system provide humoral immunity by circulating freely in the blood and lymph, where they
alisha [4.7K]

Answer:

Adaptive immune defense system consists of lymphocytes like B-lymphocytes and T- lymphocytes. B-lymphocytes provides humoral immunity while T- lymphocytes provide cell-mediated immunity to the body.

99% of lymphocytes circulate freely in the blood and lymph. B lymphocytes differentiate into plasma B cells and B memory cells when interact with antigen presented by T helper cells.  

Then plasma cells secrete antibodies in the circulation which binds to extracellular antigens through antigen-binding site. Then the bounded antigen is recognized by receptors present on phagocytic cells. This receptor binds the Fc region of antigen bounded antibody and destroy the antigen by phagocytosis.

5 0
3 years ago
Can someone answer this please :)
IrinaK [193]
The answer will be for you U
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What are some examples of commensalism in an ecosystem?.
harina [27]
Commensalism is when one organism benefits off the other one without harming it. Examples are tree frogs that use plants for protection or jackals that have been expelled from packs trailing tigers and feeding on the remains of its kill. Barnacles on whales get shelter by attaching to a whales body
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