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Elenna [48]
3 years ago
12

An unknown sample known to contain either triglycerides or phospholipids is placed in water. The sample forms a separate layer o

n top of the water, with no mixing in the bulk volume of water. What type of lipid does the sample contain, and what structural element is responsible for the sample’s behavior in water? a. Triglycerides, double bonds in fatty acid tails b. Triglycerides, ester linkages c. Triglycerides, long-chain hydrocarbon tails d. Phospholipids, ester linkages e. Phospholipids, glycerol backbone
Biology
1 answer:
vodka [1.7K]3 years ago
7 0

Answer: Option C) Triglycerides, long-chain hydrocarbon tails

Explanation:

Triglycerides are lipids, with three fatty acids (the same or different) having long hydrocarbon tails.

The hydrocarbon tails in triglycerides is the structural element that makes it insoluble in water as seen in the sample forming a separate layer on top of the water because it does not form hydrogen bonds with water molecules i.e hydrophobic

Thus, option C is the answer

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Pea flowers may be purple (P) or white (p). Pea seeds may be round (R) or wrinkled (r). What proportion of the offspring from th
Mumz [18]
When crossing alleles for color, you get
25% pp
50% Pp
25% PP
White flowers are recessive, so there is a 1/4 chance

And when crossing alleles for shape you get
25% rr
50% Rr
25% RR
Wrinkled seeds are recessive so there is a 1/4 chance


Since you are looking for white flowers AND wrinkled seeds, you need to multiply 1/4 x 1/4, giving you a 1/16 chance that the offspring will have these two traits
7 0
3 years ago
At 95% humidity, what percentage of the air around us is water vapour? Can you drown? ...?
NISA [10]
Humidity<span> is the amount of </span>water<span> vapor in the air. </span>Humidity<span> varies from place to place and season to season.

</span><span>There are two types of Humidity:
Absolute Humidity and Relative Humidity.
 
Absolute Humidity is the weight of water vapor in a cubic meter of air. The higher the temperature, the higher the ability of air to hold water. For example, at 20 C, the maximum Absolute Humidity is 17.3 g/m^3. At 50 C, the maximum Absolute Humidity is 83.0 g/m^3.  Relative Humidity is the % of water vapor in the air relative to the maximum possible Absolute Humidity.</span><span>

</span><span>When we use the word Humidity in ordinary speech, we're talking about Relative Humidity. So,  if the humidity is 95% or even 100%, that doesn't mean 95% or 100% of the air around us is water vapor; just the amount of water in the air is 95% or 100% of the maximum it can hold. 
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Therefore, we wouldn't drown at 95% humidity, we will be uncomfortable due to the heat content of air and water but we are still be able to breathe. I hope this answer helps.
6 0
3 years ago
What conditions created the numerous fossils that make up the Burgess Shale?
grin007 [14]
The Burgess Shale is a rock formation that is known for having an abundance of soft bodied organisms preserved in shale. This formation is significant because it preserves organisms from the Cambrian Explosion. The Cambrian Explosion is a period in time that coincides with the Pre- Cambrian- Cambrian boundary around 542 million years ago. The period represents an unusually rapid radiation of organisms. 
Fossils of the Burgess Shale are thought to be well preserved because most were thought to be buried fairly rapidly and in conditions that had little or no oxygen. The rate of decomposition is slowed in these conditions so soft body parts of the organisms were preserved for millions of years in the mud-stone that eventually became lithified to shale. <span />
4 0
3 years ago
Read 2 more answers
The bacteria Listeria monocytogenes is capable of doubling every 36 hours in the refrigerator at 4°C and can grow even when temp
icang [17]

Answer:

True

Explanation:

Listeria monocytogenes is a psychrophilic food-borne pathogen that is problematic for the food industry. Structures of Csps from psychrophilic bacteria have not yet been studied.

Listeria is not killed by freezing. Growth is arrested altogether, but normal growth will be resumed after thawing.

4 0
3 years ago
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inysia [295]
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Therefore PROTEINS are the reason skin cells, for example, are different than brain cells, on the molecular level in the same organism.
4 0
3 years ago
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