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lana [24]
2 years ago
14

A certain widely distributed mammalian species remained unchanged for about 30 million years. Most members of this species lived

on a fertile plain, but some members (that were less well adapted) survived in low numbers in the surrounding mountains. They adapted and evolved to this area and became significantly different from their relatives on the plain. A sudden meteorite attack struck the plain and destroyed the plain population. The mountain population was unaffected and as the plain environment recovered moved to the plain. In the absence of competitors, they underwent a very rapid population explosion. Which mode of evolution does this example explain
Biology
2 answers:
Dahasolnce [82]2 years ago
7 0
Punctuated equilibrium is the answer.
sdas [7]2 years ago
5 0
For the answer to the question above, p<span>unctuated equilibrium (also called punctuated equilibria) is a theory in evolutionary biology which proposes that most species will exhibit little net evolutionary change for most of their geological history, remaining in an extended state called stasis. When significant evolutionary change occurs, the theory proposes that it is generally restricted to rare and rapid (on a geologic time scale) events of branching speciation called cladogenesis. Cladogenesis is the process by which a species splits into two distinct species, rather than one species gradually transforming into another.</span>
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What does the term strain mean as it is used in genetic crosses
LUCKY_DIMON [66]

In biology, the strain is a low-level taxonomic rank used in different contexts:

In microbiology, a strain is a part of a bacterial species different from other bacteria of the same species by a minor but identifiable difference. Strains are often created in the laboratory by mutagenesis existing strains or wild-type examples of bacterial species.

In zoology, a strain corresponds to an individual or group of individuals who are at the origin of a line of descendants, sometimes called the holotype, paratypes, etc. A strain is a population of organisms that descends from a single organism or pure isolate culture. Strains of the same species may differ slightly from each other in many respects.

A strain thus consists of a group of organisms of the same species possessing certain differential traits based on their relationship; either they come from the same region, as the same watershed of a river, or they are the fruit of a particular breeding program (exists as a whole interbreeding without introductions from external sources).

5 0
3 years ago
How many NADH molecules are produced on each turn of the citric acid cycle?
gayaneshka [121]

Answer:

Three

Explanation:

Citric acid cycle or tricarboxylic acid (TCA) cycle is the part of cellular respiration. This cycle is carried out in the mitochondria matrix. Citric acid cycle begins with the entry of 2 carbon compound acetyl Coenzyme A (CoA). In one turn of the cycle, one molecule of acetyl CoA enters into the cycle. On completion of one turn of  citric acid cycle, two molecules of carbon dioxide, 3 molecules of reduced NADH and one molecule of reduced FADH₂ and 1 molecule of GTP are produced.    

5 0
3 years ago
Are fermentation reactions intracellular or extracellular? Explain.
kenny6666 [7]

Answer: Yes.

Explanation:

Fermentation is a general term denoting anaerobic degradation of glucose or other organic nutrients in various products to obtain energy in the form of ATP. Fermentation occurs when, after glycolysis, the Krebs cycle is not performed, because the organism does not have it or because this pathway is blocked, such as during hypoxia (lack of oxygen). Fermentation is a process used by bacteria to obtain energy, does not use oxygen and occurs in the cytoplasm of cells, ie an intracellular process, and each step is catalyzed with the help of different enzymes.

Some industries use this process in the production of some products, known to all of us, such as:

1. yogurt is produced by the famous lactic fermentation, where bacteria called lactobacilli to produce lactic acid.

2. bread and beer are produced by alcoholic fermentation, where the fermentation is carried out by fungi (facultative anaerobic), which ultimately produce alcohol;

3. vinegar to that produced by acetic fermentation, which consists of a chemical reaction, where partial oxidation of ethyl alcohol occurs, obtaining acetic acid.

4 0
2 years ago
Which best describes an internal critic?
alexira [117]
A voice that criticizes your thoughts and actions.

Answer: In short, the answer will be choice A

Hope this helps! :)

3 0
3 years ago
Read 2 more answers
The sporophyte generation produces spores that grow into a?
Kamila [148]
The sporophyte generation produces spores that grow into a GAMETOPHYTE.
7 0
2 years ago
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