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2 years ago

3) A primary objective of cell fractionation

Biology

1 answer:

ivanzaharov [21]2 years ago

8 0

Answer:

D) Is the answer due to separation of cell parts from using centrifugation.

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5. A logging company cut down all the large spruce trees in an area of forest. After the area was cleared, spruce seedlings bega

andrew-mc [135]

The missing part of the question is -

" Is this Primary or Secondary Succession?"

Answer:

The correct answer is - secondary succession.

Explanation:

Recolonization of the plant and animals to habitat after a major disturbance such as flood, lava eruption, wildfire, or human disturbance is characterized as secondary succession.

In this particular case, there is secondary succession occurs, there is man-made disturbance tajes place as logging company clear the spruce trees from a habitat, and after clearing the land the spruce seedlings began to sprout, birds, rabbits recolonize to the area.

3 0

2 years ago

In vertebrates with a double-loop circulation as illustrated in Figure 27–4, the loop that passes through the lungs is responsib

egoroff_w [7]

The correct answer among the choices provided is option A. Lung capillaries are responsible for exchanging carbon dioxide for oxygen from the air. Blood that comes from the heart gets oxygen from the alveoli. The carbon dioxide in the blood goes into the alveoli at the same time.

3 0

2 years ago

Read 2 more answers

A family decides that they want to produce chihuahuas with long hair. identify a procedure that could be used to make sure that

Butoxors [25]

Answer:

Use a product that makes the dogs grow long hair a non harmful fertiliser could work

Explanation:

6 0

2 years ago

Thyroxine, an important hormone that controls the rate of metabolism in the body, can be isolated from the thyroid gland. If 0.4

MA_775_DIABLO [31]

Answer:

The molar mass of thyroxine is 18,2 g/m

Explanation:

To solve this we must apply the colligative property of cryoscopic descent whose formula is:

T° sv pure - T° sl = Kf x molality

So let's replace our values

5,444°C - 5,144°C = 5,12 °C/m x molality

0,3°C = 5,12 °C/m x molality

0,3°C / 5,12 m/°C = molality

2,5 m

Now you should know that molality is moles from solute in 1kg of solvent but you dont have 1kg you have just 10 g. Let's convert for the rule of three

10 g = 0'010 kg

If 1 kg has 2,5 moles of thyrosine, how many for 0,010 kg

moles = (0,010kg * 2,5 moles)/1kg

moles = 0,025

Now we have the moles of thyrosine in our solution and we were informed that we dissolved 0,455 g so let's get the molar mass (mass of compound for one mole)

moles = mass/ molar mass

molar mass = mass/moles

molar mass = 0,455g/0,025 moles

molar mass = 18,2 g/m

3 0

2 years ago

Some migratory birds are heterothermic, meaning they sometimes maintain a constant body temperature and other times allow their

eduard

Answer:

B. Birds allow their temperature drop in order to increase their production efficiency.

Explanation:

Most birds can drop the temperature a few centigrade degrees, while there are torpid birds capable of lowering much more. Birds can drop body temperature in response to environmental conditions. Bird species including, among others, swifts, hummingbirds and chickadees are capable of regulating body temperature during torpor state. There are different morphological and behavioral adaptative traits that enable birds to minimize the cost of thermoregulation. In the first place, epidermis surface allows heat loss to the environment, while arteries and veins in the legs help to retain heat in cold conditions.

3 0

2 years ago