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3 years ago

The continents began to drift apart by the end of the _______ period.

2 answers:

5 0

a. Cretaceous

The continents began to drift apart by the end of the _______ period.

NOT:

b. Cambrian
c. Neogene
d. Permian

omeli [17]3 years ago

4 0

The right answer is Cretaceous

The Cretaceous corresponds to the last period of the Mesozoic (or secondary era). It ranges from -145.5 million years to -65.5 million years.

In the Cretaceous, the global climate was particularly hot, which allowed the massive development of plankton (chalk banks), but also that of large aquatic and terrestrial reptiles.

The end of the Cretaceous was marked by the biological crisis that saw the disappearance of the dinosaurs, but also 76% of the marine species of the planet.

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What two monosaccharides are formed when the lactase enzyme hydrolyzes lactose?

kolezko [41]

Answer: It is Glucose and Galactose

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3 years ago

Which is a type of irradiation used to prevent food-borne illnesses?

kirill [66]

Answer:Gamma

Explanation: Gamma can be used to destroy different bacteria that causes food poisoning, it can also be used to preserve food and also serve as a prevention against spread of pests. irradiation can serve many purposes. Gamma radiation is used for treatment which include killing of bacteria and deinfestation of agricultural product. It is used to kill microorganisms on a variety of product, and it is ideal for many products. Irradiation is the process of exposing food to a very high source of energy. Gamma irradiation make use of high energy gamma rays that are emitted by radioactive cobalt 60 or Cesium 137.

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3 years ago

"A total artificial heart (TAH) is an electrically powered pump that circulates blood into the pulmonary artery and the aorta, t

yawa3891 [41]

a) It never needs batteries.

b) It's designed for extremely active patients.

c) It's specifically designed for long-term use.

d) An LVAD only supports a failing left ventricle.

Answer:

d) An LVAD only supports a failing left ventricle.

Explanation:

When both halves (R.&L Ventricles) of the heart failed to pump blood, together with the failure of the valves to regulate blood flow as in biventricular failure, a device can planted in the patient to replace the failed right or let ventricles and to control the directional flow of blood to the vascular system. This device is called TAH.

However when the left ventricle is faulty so that blood pump into the systemic circulation is affected in case of a patient who is waiting for heart transplants not old enough for transplants; who needs to sustain heart function after surgery; or patients who could not find a heart donor and therefore need to survive, a mechanical pump is implanted below the diaphragm and power by battery cell in a wearable outside. This miniature mechanical pump is called Left venticular assist device(LVAD).It only correct left ventricle anomaly .

Thus the major difference between the two is that LVAD, is only for the faulty left Ventricle correction.

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3 years ago

Processes involved when an eye views an object

tatuchka [14]

Answer:

cornea

Explanation:

When light rays reflect off an object and enter the eyes through the cornea (the transparent outer covering of the eye), you can then see that object. The cornea bends, or refracts, the rays that pass through the round hole of the pupil.

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3 years ago

How might mutations have allowed for the diversification of plant life on the Hawaiian islands

LiRa [457]

Answer:

The mutations were beneficial for each new environment.

Explanation:

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4 years ago