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romanna [79]
3 years ago
10

In general, life needs to maintain a pH level between _____.

Biology
2 answers:
earnstyle [38]3 years ago
7 0

Answer:

B 5-8

Explanation:

Dahasolnce [82]3 years ago
4 0
<span>B. Most organisms tend to be fairly neutral in their pH level. Neutral (or close to) pH levels would be in the range between 5 and 8. A pH level of 7.0 is truly neutral, so anything in that level would be considered close to the mark. 1-4 is highly acidic and has few organisms, while 9-14 would be highly basic/alkaline and also has few creatures.</span>
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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.

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⇒ Mesokaryon is the name given to the big nucleus.

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

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3. Euglenoids

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⇒ 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.

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⇒ 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

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3 0
1 year ago
Proposed the polynucleic model, stating that DNA and RNA were composed of nucleotides
Bond [772]
Phoebes Levine proposed the polynucleic model (around 1910!).
8 0
3 years ago
Which term best describes the difference in colors of the birds below? 4 birds are shown. One has light brown feathers with dark
drek231 [11]

Answer:

genetic variation

Explanation:

Genetic variation refers to the difference in genetic content of organisms within a population. The genetic makeup of living organisms are made up of GENES, which exists in contrasting pairs called ALLELES. Each allele is responsible for variation in traits exhibited by the organisms. Differences in the allelic content of organisms of the same species leading to the display of varying phenotypic characteristics is referred to as GENETIC VARIATION.

This is the case in the example given in which four birds in a population possess a range of wing and feather colors i.e light brown feathers with darker wings, dark feathers with lighter wings, medium brown feathers with light wings, and medium brown feathers with very dark wings, all resulting from a variation in their genetic content. Hence, this is an example of GENETIC VARIATION.

8 0
3 years ago
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3 years ago
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Amanda [17]
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3 years ago
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