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Westkost [7]
3 years ago
14

How might genetic drift be important in a small population. see section 23.4 (page 470) . view available hint(s) how might genet

ic drift be important in a small population. see section 23.4 (page 470) . it decreases genetic diversity only by reducing population size. it increases genetic diversity by introducing alleles from one population into another. it decreases genetic diversity via sampling error during mating. it increases genetic diversity by introducing new genes into the dna of a species?
Biology
1 answer:
frutty [35]3 years ago
4 0
The correct answer is it decreases genetic diversity only by reducing population size.  
<span>
The great explanation for this is a bottleneck effect, which is an extreme example of genetic drift. The bottleneck effect occurs when the size of a population is reduced due to a catastrophe. When it happens, only a small, random number of individuals survive the event and pass through the bottleneck. Thus, the genetic composition of the random survivors is now the genetic composition of the entire population which means that the genetic diversity is reduced.</span>
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Compare and contrast the three types of blood vessels?
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The different blood vessels; First, Arteries that carry the blood from the heart. Then, the Capillaries which allow an exchange of water and chemicals throughout the blood and the tissues. Finally, Veins that carry blood from the capillaries to the heart.

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3 years ago
What would happen to plant roots when we grow plants in space?
Ivan

Answer:

Normally, plant roots grow downward,but in space, roots grow in every direction.

Explanation:

Plant roots grow downward ,because it’s easy for them to soak up water and nutrients that make their way into the soil.

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3 years ago
During meiosis, homologous chromosomes exchange genetic material. This exchange of genetic material —
pantera1 [17]

Answer:

Crossing over

Explanation:

This exchange of genetic material is called chromosomal crossover, or crossing over.

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3 years ago
What do you call the end of a straw wrapper that a waiter leaves on your straw when serving your drink?
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The waiter tears the raised part of the straw wrapper a few inches from either end and he pulls until a piece of the wrapper is entirely removed. The exposed part of the straw is what is then placed in the drink, leaving the remaining wrapper for the customer to remove himself. This will assure the customer that the waiter has not touched the straw with bare hands. The part of the straw that has remained is called a straw lace, or a drinking straw sleeve or a strawphylactic.

4 0
3 years ago
To my esteemed Biology colleagues: 10/15/19 I am National Park Ranger, Imani. I am writing you as my park is in desperate need o
Zanzabum

Answer:

See explanation below.

Explanation:

1. Explain the difference in the roles of producers, consumers, and decomposers in the Everglades.

In the Everglades, producers would be all <u>species of organisms that are autotrophs such as different species of plants</u>. Consumers are categorized into three: primary, secondary and terciary consumers. <em><u>Primary consumers</u></em><u> feed on plants (e.g. insects), </u><em><u>secondary consumers</u></em><u> eat the primary consumers (e.g. mice or rats), while </u><em><u>tertiary consumers</u></em><u> are higher predators that eat the secondary consumers (e.g. racoons)</u>. Finally, decomposers are bacteria, archaeans, fungi, or worms that live in soil which decompose organic matter.

2. Based on your knowledge of how to classify living organisms, in what domain and kingdom do the producers, consumers, and decomposers belong?

In Biology, the three domains are Archaea, Bacteria, and Eukarya; while there are six kingdoms: Archaebacteria, Eubacteria (true bacteria), Protista, Fungi, Plantae, and Animalia.

  • Producers, that is plants, belong to the Domain Eukarya and the Kingdom Plantae.
  • Primary, secondary, and tertiary consumers also belong to the Domain Eukarya and to the Kingdom Animalia as they are all animals and eukaryotes.
  • Decomposers are classified into the three domains: Archaea, Bacteria, and Eukarya. Bacteria belong to the domain Bacteria, archaeans belong to the domain Archaea, and worms and fungi belong to the domain Eukarya. On the other hand, decomposers are classified into Archaebacteria, Eubacteria, Protista (oomycetes), Fungi, and Animalia (worms).

3. How did energy travel in the Everglades BEFORE the alligators were removed?

Aquatic plants (producers) <-- bass <-- bluegill <-- gar <-- alligator

Aquatic plants (producers) <-- zooplankton <-- bass/bluegill <-- wood stork <-- alligator

Plants (producers) <-- cattle <-- alligator

Plants (producers) <-- insects <-- rats <-- racoons <-- alligator

4. How did removing the alligators from the food web change how energy flowed in the Everglades?

Once the alligators were removed from the food web, the populations that were once in decline began to recover because of the lack of predators. Consequently, the lack of alligators led to the uncontrollable growth of racoons, wood stork, and gar, which could also cause an alteration as they consume ecologically and economically important fish species such as the bass and bluegill.

5. How did the problem begin, and what action(s) should Ranger Imani take to solve this issue?

The problem began when the populations of alligator, an apex predator that sits at the top of the food chain, grew at an accelerated pace. This led to the uncontrolled predation of other organisms that are also fundamental to maintain an ecological balance. Therefore, Ranger Imani decided to humanely euthanize the alligators, which were preying upon them. This led to a huge increase in wood stork, gar, and racoon populations.

Alligators should not be completely removed because they help to maintain an ecological balance. Instead, Ranger Imani should work on controlling populations by implementing Wildlife Population Management strategies, such as sustainable fishing, to prevent a certain species population from reaching a high number of individuals in order to keep a healthy ecosystem where all populations are stable because removing all apex predators is not the appropriate strategy as it significantly alters the ecosystem.

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3 years ago
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