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Sedbober [7]
3 years ago
5

Which of these is not an example of a newborn reflex?

Biology
1 answer:
sladkih [1.3K]3 years ago
4 0
The right answer is thinking.

The "thinking" is not a reflex, it is a competence that the newborn will acquire a few months after his birth.Studies have shown that babies begin to think 4 months already, they have an idea about the laws of physics. He continues to reconstruct the image he makes of the world according to the latest information he receives.
At 8 months, his brain already models the probability of future action by confronting his memory with the information his senses provide. One of the keys to human intelligence.

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What structure holds the two sister chromatids together as they prepare for cell division.
otez555 [7]

Two sister chromatids are held together by the centromere

<h3>The Chromosome</h3>

The chromosome consists of 2 sister chromatids that are linked together by a structure known as the centromere.

Each of the sister chromatids carries an allele of the same gene.

The link between the two sister chromatids is broken at the anaphase stage of the cell division when spindle fibers pull them apart towards opposite poles within the cell.

More on the chromosome can be found here: brainly.com/question/296477

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Ras is a GTP-binding protein involved in cell proliferation (division). In its active form, with GTP bound, Ras activates cell s
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Answer:

E. They decrease the rate at which Ras hydrolyzes GTP.

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Activated Ras has GTP bound to it, this propagates an intracellular signal to the nucleus where cell proliferation is induced. Thereafter proliferation is switched off by the hydrolysis of the bound GTP to GDP.

Therefore decreasing the rate of GTP hydrolysis causes Ras to remain active, ultimately leading to uncontrollable proliferation characteristic of cancer.

6 0
3 years ago
Describe what the nucleus looks like.
MrRa [10]
A nucleus consists of a nuclear membrane that surrounds it, within the membrane there is a nucleolus which can be compared metaphorically to the yolk of an egg in appearance. The nucleolus is surrounded by nucleoplasm which is quite like the cytoplasm.
7 0
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8_murik_8 [283]

Answer:

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How many of the animal phyla include single celled animals?
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The answer would be 0
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