BIOLOGY HIGH SCHOOL

Useful mutations become established much more quickly in a population of microorganisms, such as the cluster of E-coli bacteria shown here, than they do in humans. The MOST LIKELY reason for this is that microorganisms

Answers

Answer 1
Answer: The answer is microorganisms have rapid cell cycle.

Microorganisms are much simpler and much smaller organisms than humans. Because of their size and complexity, they reproduce in extremely rapid pace. For example, E. coli population is able to double each 20 minutes. This is, of course, not the case with humans.
For the mutation to become established, there must pass a few generations. So, if a useful mutation establishes in E. coli cell, in 20 minutes it will be present in the next generation, in 40 minutes it will be present in the generation after that, and so on. In the humans, years (not minutes) are necessary for the mutation to be passed down to the first generation. It needs less time to establish a mutation in E. coli than in humans.
Answer 2
Answer:

Answer:

B on USATestPrep

Explanation:

Thanks to the other person who answered, rapid cell cycle is asexual reproduction very fast.

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A soap manufacturer wants to prove that their detergent works betterto remove tough stains. What is the dependent variable?

Answers

Answer:

Whether the stain comes out or not.

Explanation:

Patrick is observing a stained slide of muscle tissue under a microscope. He observes alternating dark and light bands inside the muscles. Which is the probable source of these muscles?A. Blood vessels

B. Skeletal muscles

C. Smooth muscles

Answers

These are skeletal muscles. The alternating bands are regions of actin and myosin.

Nancy visits a local reservoir where she feeds ducks and other birds. Every time she feeds them she notices that they fight for the best pieces and some do not get any. All living things struggle to get the necessary amount of food, water, and shelter. What is the term for this struggle?A. overproduction
B. natural selection
C. variation
D. competition

Answers

i think its competition

Select all that apply.Which characteristics are common to both birds and reptiles?
scales
ectothermic
amniotic eggs
beaks
feathers
hollow bones

Answers

The answer is scales and amniotic eggs.

It is obvious that reptiles have scales, which are very important for their survival. But birds have scales, too. Their claws, feet, legs and beaks are covered by scales.
Reptiles and birds, together with mammals, belong to the group of Amniote, which means their eggs are amniotic. Amniotic eggs are either laid on land or retained inside the mother, unlike anamniotic eggs that are laid in the water.

Some of the listed characteristics are not common to both groups:
- Only reptiles are ectothermic (cold-blooded animals) while birds are endothermic (warm-blooded animals).
- Birds have beaks and reptiles have teeth.
- Birds are the only animals with feathers.
- Birds have hollow bones, and thus, lighter which help them to fly. Reptiles bones are dense and heavy.

Answer:

Scales

Amniotic eggs

Beaks

Explanation:

According to the reading,

"Birds are said to have evolved from the Reptilia. They do have some similar features. They have scales on their legs and feet; they lay amniotic eggs, but with a hard shell; they have beaks, similar to many reptiles, particularly turtles."

How does a convergent boundary differ from a divergent boundary?a. A convergent boundary is where plates come together and a divergent boundary is where they move apart from each other.
b. A convergent boundary is where plates move apart from each other and a divergent boundary is where they come together.
c. A convergent boundary is where plates slide past each other and a divergent boundary is where plates come together.
d. There is no difference between a convergent and a divergent boundary.

Answers

The answer is a. A convergent boundary is where plates come together and a divergent boundary is where they move apart from each other.

Convergent and divergent boundaries, together with transform boundaries, are types of plate tectonic boundaries. The convergent boundaries are where tectonic plates come together. This results in the formation of mountains and subduction zones. The opposite of this is the divergent boundary. The divergent boundaries are where tectonic plates move apart from each other. At the divergent boundaries, oceanic crust is created.

Answer:

A :))

Explanation:

Which type of mutation always creates a stop codon?

Answers

Answer:

The correct answer would be nonsence mutation.

It is a type of point mutation in which an amino acid coding codon is converted into a stop codon.  

It results in the termination of a premature polypeptide chain.

For example, the mutation of codon third GCT into ACT in which guanine is replaced with adenine.

DNA template strand  3' - TAC TGA GCT GTG GCT CGC TCG ACT - 5'

mRNA sequence         5' - AUG ACU CGA CAC CGA GCG AGC UGA- 3'

Amino acid sequence       Met   Thr    Arg  His    Arg  Ala   Ser    Stop

Mutated DNA template strand  3'-TAC TGA ACT GTG GCT CGC TCG ACT -5'

mRNA sequence                       5'- AUG ACU UGA CAC CGA GCG AGC UGA-3'

Amino acid sequence                   Met   Thr    Stop  

The type of mutation that always creates a stop codon is a nonsense mutation.

Nonsense mutations are point mutations that result in the conversion of a codon that encodes an amino acid into a premature stop codon. A stop codon is a specific sequence of three nucleotides (either UAA, UAG, or UGA) that signals the termination of protein synthesis during translation.

When a nonsense mutation occurs, it leads to the premature termination of the protein synthesis process, as the ribosome encounters the stop codon and stops the translation prematurely. As a result, the protein synthesized from the mutated gene is truncated and typically nonfunctional.

Nonsense mutations can arise from various genetic alterations, such as single nucleotide substitutions, insertions, or deletions. The resulting premature stop codon can lead to the production of a truncated protein or the degradation of the mRNA molecule through a process called nonsense-mediated mRNA decay (NMD).

To learn more about nonsense mutation , here

brainly.com/question/30104873

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