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e-lub [12.9K]
3 years ago
6

Ben was studying conjugation in prokaryotes. He learned that prokaryotes attach themselves to each other and exchange genetic in

formation during conjugation. Which organ do prokaryotes use for conjugation?
A.
flagella
B.
endospore
C.
pilli
D.
peptidoglycan
Biology
1 answer:
egoroff_w [7]3 years ago
3 0

Answer:

C. Pili

Explanation:

Conjugation:

  • Conjugation is the transfer of genetic material between two bacteria. It is referred to as horizontal gene transfer as it occurs through the formation of a horizontal connection or a pilus.
  • Conjugation occurs when the donor bacterium, containing the fertility factor (F factor; it is the gene required for pilus formation) initiates pilus formation.
  • This tube-like structure then joins the two bacteria and transfer of genetic material occurs.
  • Plasmids containing antibiotic resistance genes are also transferred in this manner.
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Succession occurs when environmental factors affecting an ecosystem change. True or False
zhannawk [14.2K]

Answer: True

Succession is the phenomena in which changes in the biotic and abiotic factors of the environment leads to change in the ecosystem. A succession is a process in which a biological community is replaced by another biological community until a mature ecosystem is formed this process is influence by environmental factors. Primary succession is the primitive environment where no biotic community previously existed it is followed by secondary and subsequent succession were life forms develop and form an ecosystem. Some of the environmental factors are:

Topographical : These are the change in the region or habitat were succession occurs. Landslides, volcanic eruption, glacier melting etc. are the examples , as these topographical changes can bring reformation of the landscape. The disturbance caused by these topographical changes will allow the disturbance tolerant species to repopulate the habitat.  This can be a transition from primary to secondary succession.

Soil : It is an abiotic factor.The growth of the plants requires suitable soil conditions. The type of soil will affect which species will inhabit the area. The soil moisture and pH greatly affect the number of plant species in an area.

Climate : It can influence the direction of succession. Climatic factors includes rain, wind etc. For example a region lacking proper rainfall the species will be tolerant to dry and drought conditions. The region with heavy rainfall, the species will be more tolerant to moisture. Wind being a climatic factor can cause wind erosion affect the soil quality. Wind can lead to heavy forest fires can therefore, wiped out community.

8 0
3 years ago
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If an organism uses mitosis (asexual reproduction) to reproduce. What is the outcome?
EastWind [94]

Answer:

B

Explanation:

I learned this 2 years ago

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Look at the dichotomous key below. How are Anopheles mosquitoes different
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Explanation:

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In the other hand, a dichotomous key is a "guide" used by biologists when they need to indentify an individual. It is organized in several steps regarding some key characteristics in order to guide you to which species/genus/family your individual belongs to. A dichotomous key never provides any kind of trustworthy phyllogenetic information, and should be understood only as a tool.

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Sergio039 [100]
There are two types of biological organization, I believe.
The first would be (from smallest to largest).
Species
Genus
Family
Order
Class
Phylum
Kingdom
Domain
The other would be:
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Cell
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Organ
Body system
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Hope this helps c:

4 0
3 years ago
6. (a) What two major changes have occurred in the North Fork Toutle River?
antiseptic1488 [7]

A massive landslide Mud flows in the Toutle river.

<h3>How changes have occurred in the North Fork Toutle River?</h3>

There had been many earthquakes in the area prior to eruption but this happen to be a massive land slide because a moving magma have over steepened the mountain slopes.

This geologic process uses gravity to cause rock, soil, artificial fill or a combination of the three to move down a slope. Slow weathering of rocks as well as soil eruption and volcanic activity also causes landslides

Thus, massive landslide Mud flows in the Toutle river.

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