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s344n2d4d5 [400]
2 years ago
13

Plants have many characteristics.

Biology
1 answer:
RSB [31]2 years ago
5 0

Answer:bnunununun Noicd

Explanation: skssssss

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This can occur when part of a population of a species becomes separated from the remainder
trapecia [35]

Answer:

Geographic isolation

Explanation:

  • Geographical isolation can occur as a result of either an accident or a coincident due to which the a part of the population of a species gets separated from the reminder of the population.
  • As a result of this separation, the separated population is unable to exchange its genetic material with the remainder of the population and thus, with time accumulates novel mutations and this may lead to the formation of a new species and this mechanism is known as allopatric or geographic speciation.
  • Geographic isolation occurs when a geographic barrier occurs due to events such as volcanic eruptions and the populations gets separated.

8 0
3 years ago
Aigner tracked the pH of rainwater at her school over three years. She noted that the average pH in the first year was 5.0. By t
xeze [42]
I believe it would be D because each number it goes down, is another power of ten so it would be 10^2 which is 100
6 0
3 years ago
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The exchange of oxygen, food, and waste between mother and fetus occurs at.....
umka21 [38]
The exchange of oxygen, food, and waste between mother and fetus occur in the placenta.
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What phase is the moon in when it is not visible in the night sky?
Anna71 [15]
Last quarter occurs after waning gibbous, when half of the moon is visible. Waning crescent is the crescent phase after last quarter. Finally, new moon occurs when no sunlight is reflected by the moon. During the new moon phase, the moon is not visible.
4 0
3 years ago
1. state the characteristics of Chrysophytes.
GuDViN [60]

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.

3 0
1 year ago
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