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dsp73
1 year ago
7

In the total time of the United States space program, how many space flight tragedies have occurred? 1 2 None 5​

Biology
2 answers:
statuscvo [17]1 year ago
6 0

About 20 astronaut have faced fatalities during the space program.

olganol [36]1 year ago
5 0

Answer:

2

Explanatioin:

DO reasearch about all the space launches

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Electrons that have been excited by light energy absorbed by a chlorophyll molecule Select one: a. are absorbed to the interior
weqwewe [10]
<h2>Answer is option "c"</h2>

Explanation:

  • The thylakoid membrane is a site of light-determined photosynthetic responses and is arranged into multi-lamellar and exceptionally stacked structures in cyanobacteria and chloroplasts. The fluid compartment encased by the thylakoid film is known as the thylakoid lumen.
  • The primary capacity of the lumen is thought to go about as a sink for protons and inorganic particles translocated during the light-driven photosynthetic electron move.
  • Then again, developing proof demonstrates that the thylakoid lumen is metabolically dynamic.
  • Hence, the answer is option c "jump to molecules in the membrane of the thylakoids".

6 0
3 years ago
Which organisms are not examples of an adaptive radiation?
gavmur [86]

Answer:

Option B, Mammals and reptiles in the post-dinosaur age.

Explanation:

Adaptive radiation is mechanism through which species evolve very fast from common single ancestors. In simple words two different species are said to have evolved through adaptive radiation when they have descended from a single lineage. This is not the case with mammals and reptiles.  

Generally in adaptive radiation, a species evolve when it faces new environmental challenges due to change of habitat or area. For example mammals have evolved from dinosaurs.  

Hence, option B is correct

5 0
3 years ago
Within a phase, a change in heat causes the temperature of the substance to _____ as the _____ energy of the molecules changes.
Nana76 [90]

Within a phase, a change in heat causes the temperature of the substance to change as the kinetic energy of the molecules changes. During a phase change, however, a change in heat causes a change in the potential energy of the molecules and the temperature will stay the same.

<h3>What is Potential energy?</h3>

Potential energy may be defined as a form of accumulated energy that relies upon the comparative situation of diverse parts of a system.

The above passage determines the differentiation between the kinetic and potential energies with respect to temperature and phase change.

Therefore, it is well described above.

To learn more about Potential and Kinetic energy, refer to the link:

brainly.com/question/14427111

#SPJ1

7 0
2 years ago
Which of these is NOT a way, or a proposed way, to store nuclear fuel rods after they have been used in a nuclear reactor? A) pu
Ainat [17]
The answer is C.)sending them on the shuttle to be suspended in space. This is the answer because  after  the nuclear fuel rods come out of the reactor, they go into a deep pool to cool off. Then they are then stored in concrete and lead-lined casks for dry storage, until, ultimately, the US government builds a deep underground storage facility to house them permanently. They are never sent on the shuttle to be suspended in space<span>. It would be too costly and too dangerous.</span>
8 0
3 years ago
Read 2 more answers
A protein isolated from a thermophilic bacterium shows a molecular weight of 160 kD when eluted from a size-exclusion chromatogr
Amiraneli [1.4K]

Answer:

as a dimer consisting of two identical monomers (80 kDa subunits) that are packed together via hydrophobic interactions

Explanation:

SDS-PAGE (sodium dodecyl sulphate–polyacrylamide gel electrophoresis), is an electrophoretic methodology used to separate proteins that have a molecular weight between 5 to 250 kDa. SDS is a well-known ionic detergent that is able to break hydrophobic interactions and hydrogen bonds. Moreover, size-exclusion chromatography is a filtration technique that separates molecules in solution according to their molecular size. In this case, SDS-PAGE showed that the target protein is composed of two identical subunits (monomers) of 80 kDa each, which were separated by the detergent and formed one single band in the SDS-PAGE gel.

4 0
3 years ago
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