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stepan [7]
3 years ago
15

. What are the major factors that cause cell growth?

Biology
1 answer:
yanalaym [24]3 years ago
7 0

Answer:

External factors include physical and chemical signals. Growth factors are proteins that stimulate cell division. – Most mammal cells form a single layer in a culture dish and stop dividing once they touch other cells. Two of the most important internal factors are kinases and cyclins.

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2. If the plankton in the example above makes 15,000 calories
salantis [7]

Energy available to krill is 1500 calories

<u>Explanation:</u>

Energy produced by phytoplankton = 15,000 calories

Energy available to krill = ?

Along the food chain, only 10% of energy is transferred to the organism of higher trophic level.

Thus,

energy available to krill = \frac{10}{100} X 15,000

                                       = 1500 calories

Energy available to small fish = \frac{10}{100} X 15,00

                                                 = 150 calories

Energy available to medium fish = \frac{10}{100} X 150

                                                      = 15 calories

Energy available to large fish = \frac{10}{100} X 15

                                                 = 1.5 calories

5 0
3 years ago
one hypothesis in the barn-swallow study was that long-tailed swallows would produce more offspring than average-tailed swallows
AURORKA [14]
I think the correct answer from the choices listed above is the last option. The control group to be used to test the hypothesis would be the swallows with average-length tails. A control group <span>is defined as the </span>group<span> in an experiment or study that does not receive treatment by the researchers.</span>
3 0
3 years ago
Read 2 more answers
How many space stations are currently in orbit? <br> A. 1 <br> B. 4 <br> C. 10 <br> D. 15
kykrilka [37]

Answer:

1

Explanation:

7 0
3 years ago
Using your knowledge of Punnett squares and hybridization, what is the probability that a purebred monohybrid, dihybrid, three-f
Nimfa-mama [501]

Answer:

100%

Explanation:

No matter how many factors are in the cross, if an 2 purebred (homozygous individuals) are crossed, (one dominant, one recessive) the dominant phenotype will always be displayed.

Imagine a cross with between two individuals true breeding for 6 traits. One shows all dominant genotypes, one shows all recessive genotypes. The only gametes those individuals can pass on will always produce heterozygotes.

AABBCCDDEEFFGG x aabbccddeeffgg

The first individual can only give ABCDEFG alleles. The second individual can only give abcdefg alleles. Therefore, all offspring will be AaBbCcDdEeFfGg, and will therefore express the dominant trait.

8 0
3 years ago
Read 2 more answers
The vegetative body parts of a higher plant is made up of-----------,------------and----------.​
IgorLugansk [536]

Explanation:

The vegetative pats of a higher plant is made up of ROOTS,STEM and LEAVES.

7 0
3 years ago
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