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3 years ago

15

the first stage of nuclear cell division in which centrioles move to opposite ends of the cells and chromosomes, spindle fibers,

and an aster become visible.

1 answer:

lidiya [134]3 years ago

8 0

Prophase is the first stage of cellular division. Followed by metaphase, anaphase, and telophase.

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A student is studying the amino acid sequence of a protein shared by four organisms. The student wants to know which organism is

den301095 [7]

Answer:

Its organism B

Explanation:

because its closer to organism A

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3 years ago

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List four supporting tissues in plants

Ilya [14]

four support ing tissue in plants are

1. vascular tissue

2. epidermal tissue

3. ground tissue

4. meristematic tissue

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3 years ago

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Nuclei with an _____________ number of protons and neutrons possess a property called spin. Nuclear spin can be thought as eithe

andriy [413]

Answer:

Explanation:

$\text{We are to fill in the blanks with the correct words that best suit the blanks}$

$\text{Nuclei with an} \ \mathbf{odd} \ \text{number of protons and neutrons possess a property }$

$\text{called spin. Nuclear spin can be thought as either up or down with the spin }$

$\mathbf{magnetic \ field.}$

$\text{When a molecule is placed in an NMR, a large} \ \mathbf{magnetic} \ \text{field is applied making the }$ $\text{spin states become of unequal energy, with the spin that generates a magnetic field }$ $\text{in the same direction of the applied magnetic field being}\ \mathbf{ lower} \ \text{ in energy. The NMR }$ $\text{then uses} \ \mathbf{ radio \ frequency}\ \text{ to 'flip the spin' of each nuclei, wherein each nuclei will }$ $\text{require a specific energy level of radiation that corresponds to its difference in }$ $\text{energy of spin states, this is often called the nuclei's}\ \ \mathbf{resonance } \ \text{frequency, }$ $\text{which is measured by the NMR and translated to teh final spectra.}$

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2 years ago

Flammable materials, like alcohol, should never be used or dispensed near

Helen [10]

Hello!

Flammable materials, like alcohol, should never be used or dispensed near any flame.

I hope it helps!

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3 years ago

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The pedigree below concerns the autosomal recessive disease phenylketonuria (PKU). The couple marked A and B are contemplating h

likoan [24]

Answer: Hello your question some missing data attached below is the complete question

answer:

P( first child having PKU ) 0.25 ≤ x ≤ 0.5

Explanation:

The pedigree father has PKU ( pp ) ( From the top right )

pedigree mother = PP

The possible resultant progeny = Pp

Resultant progeny marries non-carrier ( Pp x PP ) = PP , PP, pP, pP

Hence B is either ; PP ( non carrier ) or Pp ( carrier )

<em>From left</em>

one of the Resultant progeny = pp ( affected ). this simply means pedigree parents where both carriers or sufferers i.e. Pp or pp

Hence A is either ; Pp or pp

The probability of their first child having PKU

= PP x Pp = PP, Pp, PP, Pp ( probability = 0 in this case )

= Pp x Pp = PP, Pp, pP, pp ( probability = 1/4 * 100 = 25% )

= Pp x pp = Pp, Pp, pp, pp ( probability = 2/4 * 100 = 50% )

P( first child having PKU ) 0.25 ≤ x ≤ 0.5

lets denote dominant Gene = PP, recessive Gene = pp

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2 years ago