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Elis [28]
1 year ago
10

1. state the characteristics of Chrysophytes.

Biology
1 answer:
GuDViN [60]1 year ago
3 0

1. Chrysophytes

⇒ Unicellar

⇒ Present in water bodies with low calcium levels.

⇒ Golden yellow colour due to accessory pigment.

⇒ Cell walls made of cellulose and silica.

⇒ Free swimming.

⇒ Two unequal flagella.

2. Dinoflagellates

⇒ Dinoflagellates are essentially golden-brown, biflagellate, unicellular motile protists.

⇒ Golden brown is the primary color, but due to changes in the ratios of other pigments, it may also take on yellow, green, brown, or even blue forms.

⇒ Theca or lorica, composed of articulated and sculpted cellulose plates, is a stiff covering that typically covers cells.

⇒ One flagellum is transverse and the other is longitudinal, making the two flagella distinct (heterokont).

⇒ Mesokaryon is the name given to the big nucleus.

⇒ Chlorophyll a and chlorophyll c are found in plastids or chromatophores.

⇒ In the sea, certain dinoflagellates like Gymnodinium and Gonyaulax proliferate in vast numbers, turning the water red and resulting in the so-called "red tide."

⇒ Dinoflagellates in the ocean exhibit bioluminescence. such as Noctiluca.

3. Euglenoids

⇒ Unicellular protists called euglenoids, like the genus Euglena, are frequently found in freshwater.

⇒ The pellicle, a protein-rich cell membrane, exists in place of the cell wall.

⇒ They bear two flagella on the anterior end of the body.

⇒ A small light sensitive eye spot is present.

⇒ They can prepare their own food because they have photosynthetic pigments like chlorophyll. They act like heterotrophs when there is no light, though, by catching other tiny aquatic creatures.

⇒ They are referred regarded as the connecting link between plants and animals since they exhibit both plant and animal-like characteristics, making it difficult to categorize them.

4. Slime moulds

⇒ Chlorophyll does not exist in them.

⇒ Only the plasma membrane encloses them. The spores, however, contain cellulose cell walls.

⇒ They often reside near decomposing vegetation.

⇒ They have a diverse spectrum of coloring.

⇒ They are saprotrophic or phagotrophic feeders.

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No the amplitude of each waves are different on different cardiac cycles.

<u>Explanation:</u>

  • The PQRST waves are used to represent the atrial and ventricular depolarization and repolarization.  These waves are reflected in ECG.  
  • In this as the series, p occupies the first place then QRS complex and at last T wave. In the QRS wave complex,  R wave is said to be the largest wave.  
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3 years ago
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mars1129 [50]
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nydimaria [60]

Answer:

The question is incomplete as options was not given. Here is the complete question:

Which phrase does not describe a way the human body responds to fight disease?

(1) destruction of infectious agents by white blood cells

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(3) increased production of white blood cells

(4) production of pathogens by white blood cells

Explanation:

Answer is option 4, PRODUCTION OF PATHOGENS BY WHITE BLOODS CELLS.

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There is increased production of white blood cells during infection by pathogens, the infectious agents are destroyed by the white blood cells and the production of antibodies against the pathogens.

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The interior of the chloroplast contains another membrane—the thylakoid membrane—which is folded to form numerous connected stacks of discs. Each disc is a thylakoid and each stack is a granum (pl. grana).

The light-dependent reactions of photosynthesis take place within the thylakoids. These reactions occur when the pigment chlorophyll, located within the thylakoid membranes, captures energy from the sun (photons) to initiate the breakdown of water molecules.

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