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3 years ago

How does earths solid inner core affect seismic waves

2 answers:

Alex3 years ago

6 0

Why Earth's inner core has speed trap for seismic waves. Earth has multiple layers: the crust, the mantle, the liquid outer core and the solid inner core. Something is not quite right inside the Earth's core. When seismic waves from earthquakes ripple through its solid center, they hit a speed bump.

choli [55]3 years ago

5 0

Answer:

The earth solid inner core does not affect the seismic waves, it helps to transmit all types of waves which is generated by the earthquakes. It is the only primary waves that are being passed through all mediums, the secondary waves do not pass through the medium and it gets reflected. The seismic waves pass faster through the inner core.

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The region of a Drosophila embryo with a low concentration of bicoid protein will develop into the _____. a) abdomenb) male flow

joja [24]

Answer:

The correct option is d) head.

Explanation:

Bicoid protein works as a transcription factor. It enters the nuclei of the embryos in early segmentation, where it activates the hunchback gene. In Drosophila, embryonic development begins at the time of fertilization. The sperm enters the mature oocyte through the micropile, a structure located in what will be the anterior region of the egg. Bicoid and hunchback mRNAs, protein products are critical for the formation of the head and thorax. Already in the early stages of oocyte development, certain mRNAs are located in specific regions of the oocyte: mRNA molecules encoding the Bicoid protein are preferentially located in the anterior region of the oocyte. Moderate levels of the bicoid protein are necessary to activate the formation of the thorax (i.e., the expression of the hunchback gene) but the formation of the head requires high concentrations of Bicoid, the promoters of a specific gap gene of the head must have sites of low affinity binding for Bicoid, so that this gene can be activated only in extremely high concentrations of Bicoid.

The lack of Bicoid protein affects the formation of the head and other structures in the anterior region of the oocyte.

6 0

3 years ago

Why do polar molecules have better adhesion then non- polar ?

adoni [48]

Answer:

The attraction of water molecules to other substances, like soil or glass, is called adhesion. The cohesive forces between polar molecules are stronger than those between non-polar molecules, such as those in oil or syrup.

4 0

3 years ago

In chickens, comb shape is determined by genes at two loci (R, r and P, p). A walnut comb is produced when at least one dominant

mariarad [96]

Answer:

in the obtained options, there is no dominant gene for the crossed pairs, therefore, no answer would be correct, however, when assigning a dominant character to the P gene, the correct answer would be:

E. Rr pp *rrPp

Explanation:

According to the information obtained we deduce:

Comb shape is produced by R and P

Comb of walnuts with an R or a P

Pink comb: 1 dominant P and R at the first locus and 2 recessive at the next locus

Pea comb: 2 recessive at the start and one dominant in the next position

1 single comb: 2 recessive at both loci

Rr pp × rr Pp will produce from the interbreeding: 2 walnuts, 1 single and 1 pea offspring.

We deduce that for the pink comb the genotype is: Rrpp

and for the pea comb it is rrPp

Rr pp × rr Pp generates crosslinks containing RrPp, rrPp, rrpp as children in a 2: 1: 1 ratio.

4 0

3 years ago

Increase the mutation rate with radiation or chemicals.

MakcuM [25]

Answer:

Use chemicals to prevent chromosomal separation during meiosis in plants.

8 0

3 years ago

Read 2 more answers

Which disease includes loss of motor neurons in the anterior horns of the spinal cord and motor nuclei of the lower brain stem?

otez555 [7]

Motor neuron disease includes loss of motor neurons in the anterior horns of the spinal cord and motor nuclei of the lower brain stem.

3 0

4 years ago