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ICE Princess25 [194]
3 years ago
10

The rock below is in Whistler, Canada. What type of weathering is illustrated here? A. Frost wedging. B. Abrasion. C. Pressure r

elease. D. Salt weathering.
Biology
1 answer:
Lina20 [59]3 years ago
3 0

Can you please display a picture of the "rock below in Whistler, Canada"? It'll make the question easier to answer.

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In gel electrophoresis DNA molecules migrate from _____ to _____ ends of the gel.
masha68 [24]

Answer:

b, negative ... positive

Explanation:

Gel electrophoresis is  a method used in molecular biology for DNA analysis. This method includes the separation of DNA fragments through the gel according to their size or shape under the influence of aplid electric current. Since the fragments of DNA are negatively charged, they will move from negative to positive end.

Small fragments will move faster than larger ones.

One of the major source of error is contamination of the DNA sample. This refers to the presence of foreign DNA in the sample of interest. As a consequence, the gel will have more bands.

Another errors might appear as a result of wrong concentration of the gel, wrong buffer pH, high/low concentration of dye etc.

8 0
3 years ago
Identify the isolation mechanisms described using the drop-down menus. Differences in courtship or other behaviors prevent matin
lana [24]

Answer:

First, let's add the missing piece of information

Identify the isolation mechanisms by labeling either Geographical, Behavioral, Temporal, or Anatomical from the drop-down menu

The correctly identified mechanism is

1. Behavioral

2. Geographical

3. Temporal

4. Antomical

Explanation:

Differences in courtship or other behaviors prevent mating.- our answer is Behavioral

(Behavior isolation is the term used to describe reproductive isolation as a result of variations in courtship behaviours between the members of the same species occupying the same region).

Species can no longer interact because they are separated by physical boundaries.- it is Geographical

(Geographic isolation is seen in situations where the two populations of the same species get isolated by a geographical barrier such as mountain, island or river. This results in an inability to breed between the two populations as they become distinct new species).

Species do not interbreed because they breed at different times. this is definately Temporal.

(Temporal isolation is a form of reproductive isolation due to mating at separate times and seasons among two populations of the same species).

Species cannot physically mate due to genitalia or gametes being incompatible. And the correct answer is Antomical.

(Anatomical isolation

It is observed in situations when two populations of the same or distinct species cannot interbreed due to physical features such as genitalia and gametes formed in the organisms that make them uniquely separated).

Yes! this is the right answer. I just solved this question and its CORRECT.

6 0
3 years ago
Read 2 more answers
Why are new pennies made with less copper than old pennies
olga_2 [115]

Answer:

because it is cheaper to afford

Explanation:

5 0
3 years ago
Why is the aplysia such a popular animal for single-cell studies of learning?
Feliz [49]

<span>Aplysia is a marine gastropod mollusc which is an often used model organism in neuroscience, especially on the cellular biology of learning and memory. What makes them easy to work with are their giant neurons, which are one of the largest. Aplysia neurons are suitable for studies of how neurons and neural circuits control behaviours. Its defensive reflex has been studied because it is mediated by electrical synapses, which allow several neurons to fire synchronously.</span>

5 0
3 years ago
Fungi include which living organisms?
mojhsa [17]

Answer:

Yeasts and molds.

Explanation:

Hope it's helpful to you

7 0
3 years ago
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