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wolverine [178]
4 years ago
15

A space probe returns with a culture of a microorganism found on a distant planet. analysis shows that it is a carbon-based life

-form that has dna. you grow the cells in 15n medium for several generations and then transfer them to 14n medium for one generation (1 round of dna replication). which pattern (shown below) would you expect if the dna was replicated in a conservative manner?
Biology
1 answer:
ExtremeBDS [4]4 years ago
4 0
<span>I believe that the pattern that would be expected is both 14 N and 15 N, this is because the DNA was replicated in a conservative manner. Semi conservative replication would produce two copies that each contained one of the original strands and one new strand, while Conservative replication would leave the two original template DNA strands together in a double helix and would produce a copy composed of two new strands containing all of the new DNA base pairs</span>
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Which of these correctly shows ecological succession in a lava field?
larisa [96]

The ecological succession that occurs in a lava field is as follows:

  • Moss and lichen arrive by birds to barren lava field.
  • Soil is created.
  • Fountain grass grows.
  • Monkeypod trees grow.

<h3>What is ecological succession?</h3>

Ecological succession refers to the series of changes that occur in a habitat gradually with new species replacing existing species or a barren habitat until the environment becomes more complex.

A lava field is a barren field where there are no species

The ecological succession that occurs in a lava field is as follows:

Moss and lichen arrive by birds to barren lava field; Soil is created; Fountain grass grows; Monkeypod trees grow.

Learn more about ecological succession at: brainly.com/question/18240055

7 0
2 years ago
Three-year-old-Joshua spits out his broccoli, scrunches his face and shouts, "Yuck!" His mother can’t understand why he has such
Natali [406]

Answer:

As we get older the number of taste buds decreases.

Explanation:

Gustatory cells or the taste buds contains the different sensory cells on the tongue. The papillae consists of all the taste receptors. The sweet, bitter, salty, umami and sour tastes are recognized by the receptors.

The different individuals have different taste because of the presence of the different taste buds. The number of the taste buds decreases the individual gets older. The children has more taste buds and can easily understand the taste of different things. Hence, Joshua dislikes the broccoli taste.

Thus, the correct answer is option (a).  

6 0
3 years ago
Are my answers correct for Q1??
sertanlavr [38]

You're correct.

Just make the last one OO

7 0
3 years ago
Question 4
olga55 [171]

Answer:

hii friend follow me me please

8 0
3 years ago
By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when
Mama L [17]

Answer:

Unconditioned stimulus.

Explanation:

Classical conditioning may be defined as a type of learning procedure in which the biological procedure is used to pair up with the previous nerve stimulus. This stimulus result in the response of an individual.

The Pavlov experiment with the dog explains the process of classical conditioning. The ringing of bell (conditioned stimulus) is paired with unconditioned stimulus (meat presentation).

Thus, the meat presentation is unconditioned stimulus.

3 0
3 years ago
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