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Tomtit [17]
3 years ago
12

What strategies and electromagnetic frequencies are thought to be the most logical for long-range communication across the unive

rse with other intelligent beings?
A. explosion of nuclear devices at specific intervals and in specific patterns across Earth when we are closest to a nearby star
B. night-by-night photography of nearby stars at hydrogen Balmer wavelengths
C. continuous radio and microwave listening and transmitting at frequencies at which the natural radio sky noise background is low
D. X-ray surveys of space at appropriate times (e.g., when Earth is closest to nearby stars in its orbit), in view of the penetrability of space at these wavelengths
Biology
1 answer:
katrin [286]3 years ago
7 0

The answer is C. The widely used technique for finding extraterrestrial life is use of SETI (search for extraterrestrial intelligence) dishes that listen for radio waves from outer space. NASA has also been sending radio waves to outer space with messages that could purportedly be decoded by alien intelligent life.







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A/An _______ exists when different concentrations of a substance exist on either side of a membrane.
Alecsey [184]

Answer:It is known as a concentration gradient which in diffusion will always flow from ares of high concentration to areas of low concentrations  

So i believe the answer to this is A.

Explanation:

4 0
3 years ago
True or False: Meiosis halves the chromosome number, whereas mitosis maintains the same chromosome number.
AleksandrR [38]

Answer:

True

Explanation:

Meiosis is the kind of cell division that results in the production of daughter cells with each cell having half number of chromosomes as the parent cell. Meiosis is the cell division employed by reproductive cells to produce gametes/sex cells. Meiosis occurs in two stages i.e. Meiosis I and II. The chromosome number reduces by half in gametes in order to ensure that after fertilization of both male and female gamete, the resulting organism has the correct set of chromosomes. e.g diploid organism produces haploid gametes which fuses to produce a diploid organism again.

Mitosis is another type of cell division that results in identical daughter cells. They are identical in the sense that they possess the same number of chromosomes as the parent cell that divided. For example, a diploid cell undergoes mitosis to produce two diploid daughter cells.

8 0
3 years ago
A biology student caught and tagged 50 trout in a small lake. After two weeks, the student caught another 40 trout and found tha
Vlad1618 [11]

The best estimate of the population of trout in the lake is 500 individuals.

The low number of tagged trout recaptured may be because the tags slipped off.

This possibility can be reduced if the student used tags that does not slip off easily.

<h3>Mark and recapture method</h3>

The formula for calculating the estimated number of individuals in the population is given as:

  • N = (M*C) / R

where:

  • N = estimated Number of individuals in the population
  • M = number of individuals captured and Marked
  • C = total number Captured the second time (with and without a mark)
  • R= number of individuals Recaptured (those with a mark)

Calculating the estimate trout population:

N = (50*40)/4

N = 50

Therefore, the best estimate of the population of trout in the lake is 500 individuals.

The low number of tagged trout recaptured may be because the tags slipped off.

This possibility can be reduced if the student used tags that does not slip off easily.

Learn more about mark and recapture method at: brainly.com/question/10646744

6 0
2 years ago
Can you artificially grow organs
maria [59]
 <span>Humans C</span>an't Re-Grow<span> Lost Limbs or O</span>rgans<span>, but Scientists are Successfully Cultivating Miniature O</span>rgans<span>, Specialized O</span>rgan<span> Cells and Replacement Body Parts.

Ex. So Basically People Can Grow ARTIFICIALLY Grow Organs, But Only When Your Still an INFANT Because Your Organs are Still Miniature and Still in The Human Body.

Hoped That Helped </span>
6 0
3 years ago
Put more or less in the boxes. Will choose brainliest!
Salsk061 [2.6K]

Answer:

less

more

Explanation:

6 0
2 years ago
Read 2 more answers
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