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Oksana_A [137]
2 years ago
8

How amphibians regulate their body temperature?

Biology
2 answers:
Allushta [10]2 years ago
8 0
Frog temperature. Frogs are ectotherms, this means they gettheir heat from external sources. They are sometimes called 'cold blooded', but in fact they do not have cold blood, it is justregulated by their environment. In comparison, humans are endotherms and can maintain their body temperature at about 37°C.
umka2103 [35]2 years ago
8 0
Amphibians are ectothermic or cold-blooded. This means that they do not maintain a constant body temperature like endotherms (like humans) do. The amphibian’s body temperature is controlled by the surrounding environment and nearly matches that temperature. Amphibians behaviorally will move or do activities to adjust their body temperature. For example, if they are too hot they will move to the shade and if they are too cold they will move to a sunny area. Some frogs secrete fluids to help maintain their moisture and temperature in extreme environments or conditions.
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Why does the sky looks blue in color?
Aleksandr-060686 [28]

the air and all the gasses

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In a unique species of plants, flowers may be yellow, blue, red, or mauve. All colors may be true-breeding. If plants with blue
Zolol [24]

Answer:

F1) 100% bbRr, red flowered plants.

Explanation:

<u>Available data:</u>

  • flowers may be yellow, blue, red, or mauve
  • colors may be true-breeding
  • the cross of blue-flowered plants with red-flowered plants, produce plants that have yellow flowers
  • F2 generation: 9/16 yellow, 3/16 blue, 3/16 red, and 1/16 mauve.

Knowing that the phenotypic ratio is 9:3:3:1, we can assume that there are two genes involved in the flower color expression. We can name these genes B and R with a dominant and a recessive allele each (B, b and R, r respectively).

According to the first cross, we might establish the following genotypes:

1st Cross: blue-flowered plant     x     red-flowered plant

Parentals)         BBrr                     x                bbRR

Gametes)     Br, Br, Br, Br                         bR, bR, bR, bR

F1) 100% BbRr, yellow plants

Parentals)   BbRr     x     BbRr

Gametes) BR, Br, bR, br

                BR, Br, bR, br

Punnett square)     BR       Br        bR          br

                  BR     BBRR    BBRr   BbRR     BbRr

                  Br      BBRr     BBrr     BbRr      Bbrr

                  bR     BbRR    BbRr    bbRR      bbRr                    

                  br      BbRr     Bbrr      bbRr      bbrr

F2)  9/16 yellow ---> 1/16 BBRR + 2/16 BBRr + 4/16 BbRr + 2/16 BbRR  

       3/16 blue ------> 1/16 BBrr + 2/16 Bbrr

       3/16 red---------> 1/16 bbRR + 2/16 bbRr

       1/16 mauve ----> 1/16 bbrr    

So,

  • Yellow-flowered plants: BBRR, BBRr, BbRR, BbRr
  • Red-flowered plants: bbRR, bbRr
  • Blue-flowered plants: BBrr, Bbrr
  • Mauve-flowered plants: bbrr

According to these genotypes, the second cross would be like following,

2nd Cross: true-breeding red-flowered plants with true-breeding mauve flowered plants.                

Parentals)          bbRR       x        bbrr

Phenotype)       Red                   Mauve

Gametes)   bR, bR, bR, bR      br, br, br, br

Punnett square)    bR       bR        bR        bR                    

                    br    bbRr     bbRr    bbRr     bbRr

                    br    bbRr     bbRr    bbRr     bbRr

                    br    bbRr     bbRr    bbRr     bbRr

                    br    bbRr     bbRr    bbRr     bbRr

F1) 100% bbRr, red flowered plants.

6 0
3 years ago
What is the carrying capacity of an ecosystem for a given population?
kari74 [83]

Answer:

The correct answer would be the option B.

The carrying capacity of an ecosystem refer to the maximum number of plants, animals, insects, and crops an ecosystem can support without getting any degradation.

Carrying capacity of different species may vary within an ecosystem.

It is determined by different factors such as food availability, shelter, water supply, et cetera.

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3 years ago
PLEASE ANSWER ASAP (BRAINLEST!!!!)
lesya [120]

Answer:

1. Cell Wall

2. Amount of Vacuoles

3. Plastids

4. Size

5.  Plasmodesmata

Explanation:

1. Animal Cells dont have cell wall, while Plant Cells do.

2. Animal Cells contain many/ multiple vacuoles, while Plant Cells only contain one.

3. Animal Cells dont have plastids, Plant Cells do have (eg. Chloroplasts)

4. Animal Cells are larger in comparison to Plant Cells

5. Animal Cells dont have plasmodesmata while Plant Cells do have.

7 0
2 years ago
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