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BabaBlast [244]
4 years ago
7

X-ray imaging of the arterial blood vessels in the brain after injection of contrast material

Biology
1 answer:
netineya [11]4 years ago
7 0
<span>X-ray imaging of the arterial blood vessels in the brain after injection of contrast material is Cerebral Angiography.
During this imaging, the contrast material is injected into femoral artery that is present in the thigh and then x-ray motion pictures are taken, these images are taken to detect the presence of vascular disease in the brain.</span>
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Reptiles are better suited to dry land than their amphibian ancestors because
Vaselesa [24]

Answer:

<u><em>All of the above.</em></u>

Explanation:

1. Their watertight skin minimizes moistures loss: <em>Reptiles have a reputation that they are “slimy” when we touch and hold them; however, they have dry skin, which has even fewer glands than mammals or amphibians. The main special feature of their skin is that the epidermis is heavily keratinized with a layer, which also prevents water loss.</em>

2. Amphibians must lay eggs in water or in moist soil to reduce moisture loss: <em>Because amphibian eggs don't have an amnion, the eggs would dry out if they were laid on the land, so amphibians lay their eggs in water.</em>

3. Reptile egg shells are harder than amphibians' eggs: <em>Reptile eggs are coated with a leathery or brittle coating, and the animals that hatch from them are miniature versions of the full-sized animal parent. In contrast, amphibian eggs are transparent and jelly-like. The animals that hatch from them still must go through metamorphosis.</em>

<u><em>Hope this helps you have a better understanding:) !!</em></u>

7 0
2 years ago
What is the kinetic energy of a 1,200 kg object that is moving at a speed of 24 m/s​
Anit [1.1K]
The Kinetic energy is 345,600 J

=1/2^2

6 0
3 years ago
In a species of snail, dark-shelled individuals are better hidden from bird predators in the shady forest, while light-shelled i
Harrizon [31]

Answer:

C. Disruptive Selection

Explanation:

Disruptive selection occurs when two extremes of continuous variation are favored more than intermediate traits.  

The extremes of continuous variation exhibited in this species of snail is the color of their shell which allows them to blend with the background of their habitat.  

The shady forest of the habitat makes the dark-shelled individuals to be better hidden from bird predators, while the light-shelled individuals are better hidden in well-lit brushy edge areas. This disruptive coloration exhibited by both individuals makes both individuals of this species of snail less vulnerable to predation.  

Both individuals of this species both extremities would naturally survive in this habitat as snails with intermediate extremities would be highly preyed on since there is no area of intermediate brightness in the habitat to make them invisible to predators

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3 years ago
Which of the following choices is not a key characteristic to differentiate cancer cells from normal cells?
nataly862011 [7]

Answer:

cells that should not invade other tissues do invade other tissues

Explanation:

6 0
3 years ago
_________ not only transmit pathogens, but also serve as hosts for the multiplication of the pathogen during some phase of the p
fomenos
Biological vectors
Hope it helped
7 0
4 years ago
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