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Hitman42 [59]
4 years ago
10

Bt corn is a genetically modified crop that contains a gene from another species. Which characteristic does this gene give the p

lant
A. Sweeter flavor
B. Drought tolerance
C. Taller stems
D. Insect resistance
Biology
2 answers:
Angelina_Jolie [31]4 years ago
7 0

The right answer is D.

The effectiveness of BT-Corn compared to conventional insecticide treatment  is very much higher:

* The plant itself produces the toxin that blocks the digestion of or target insects: the entire plant is protected where a treatment (out of neonicotinoids, very expensive and reserved to the seed treatment) allows only a protection of surface and must be renewed several times.

* The selectivity of the treatment is very superior: each variant of the BT molecule targets only a family of insects but we do not know the impact of their cumulative effects in the environment.

grin007 [14]4 years ago
5 0

Answer:

D

Explanation:

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Smaller fragments of dna will move __ distances in an agarose gel during electrophoresis.
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greater

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the shortest DNA fragments travel greater distances than the longest DNA fragments.

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Which of these factors is pushing elephant species toward extinction?
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Read 2 more answers
In one type of plant, orange petals (O) are dominant over yellow petals (o) and tall stems (T) are dominant over short stems (t)
svet-max [94.6K]
A Punnett square without interaction between genes is shown as follows:

          OT        Ot     OT       Ot
OT    OOTT  OOTt   OOTT  OOTt
oT     OoTT   OoTt   OoTT   OoTt
OT    OOTT  OOTt  OOTT   OOTt
ot      OoTt    Oott    OoTt     Oott

Summary: 
Genotype    probability      phenotype
OOTT          4/16 = 1/4      orange/tall
OOTt           4/16 = 1/4      orange/tall
OOtt            0/16 = 0         orange/short
OoTT          2/16  = 1/8      orange/tall
OoTt            4/16  = 1/4     orange/tall
Oott             2/16  = 1/8     orange/short
ooTT                        0        yellow/tall
ooTt                         0        yellow/tall
oott                          0        yellow/short
(Total                         1)

Therefore the phenotype distribution is as follows:
phenotype      probability
orange/tall      1/4+1/4+1/8 = 7/8
orange/short                          1/8
yellow/tall                               0
yellow/short                            0
(Total                                      1)
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Answer:

A genetic code shared by diverse organisms provides important evidence for the common origin of life on Earth. That is, the many species on Earth today likely evolved from an ancestral organism in which the genetic code was already present.

Explanation:

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How are the spinal cord and the brain visible different?
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The base, or lower part, of the brain is connected to the spinal cord. Together, the brain and spinal cord are known as the central nervous system (CNS). Many nerves send electrical signals to and from the brain and spinal cord.

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