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svet-max [94.6K]
3 years ago
9

Are B cells specific or can they attack a wide variety of pathogens?

Biology
1 answer:
Serggg [28]3 years ago
5 0

Answer:

i think they are specific

Explanation:

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Which of the following characteristics would make an organism less likely to face extinction?
olchik [2.2K]

The correct answer is fixed migration pattern.

Extinction means termination of last member of a particular species. This can be due to various factors. The reason could be natural or human interventions. The best characteristics of an organism to be less likely to face extinction are the fixed migration pattern. Migration of that particular species in a fixed pattern will make them adapt different environment. This saves the species from natural extinction. Even if the species of a particular geographical area dies the migrated species will be alive to breed and save the species from extinction.

7 0
3 years ago
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The Chesapeake Bay is an important natural resource. Over the years, the number of oysters in the bay has declined dramatically,
valkas [14]

Answer:

True

Explanation:

The Chesapeake Bay is an example of an estuary that is located in the United States. It is a source of edible marine creatures such as oysters, crabs, prawns e.t.c

Over the years, non - sustainable harvesting of oysters by farmers have been happening at Chesapeake bay, resulting in a reduction in the amount of oysters present.

8 0
3 years ago
Identify the substances that can readily pass through the inner mitochondrial membrane.
KIM [24]

Answer:

A,C E

Explanation:

The inner membrane of the mitochondria separate the matrix of the mitochondria from the cytosol(inner membrane space.). It is invaginated  folded inwards  to form the critae. This is an adaptive feature to increase the surface area for biochemical reaction in the mitochondria.

The invagination gives two compartments the inner mitochondria also creates the outer intermembrane space and the inner matrix

These are the substances that can pass freely the inner membrane of the mitochondria.Pyruvate and H+ can not pass through.Specifically,it is not preamble to H+ because, hydrogen ions are needed to generate the electrochemical gradients needed for the chemical energy  for phosphorylation of ADP by  P to form ATPs by the enzyme ATPase synthase.If the inner membrane is permeable to H+ the electochemical gradient will not be produced, and therefore ATPs productions stops.

O2 needs to pass through the inner membrane because it it the final electron acceptor. Therefore if not allowed to pass through oxidative phosphorylation  and ETC will nor occur.

CO2 must pass through because its accumulation will increase the acidity of the inner  mitochondria

5 0
4 years ago
What types of activity might decrease the battery life of a fully charged battery?
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Activity like having brightness all the way on or depending on how much data is used, having Bluetooth on also decreases the battery, having a charger on even when over 100 percent can make charging electronic slower. It's better to have the brightness low.
5 0
4 years ago
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Explain how human impact can lead to succession in ecosystems.
Olin [163]

Answer:

Ecological succession refers to the changes taken place in a forest over a particular period of time.

Succession is usually influenced by environmental factors such as water regimes, soil type, climate, vegetation history, and invasive species.  

Humans interventions affect all of the above-mentioned factors.

Human activities such as fragmentation of forests, clearing of forests for agricultural practices, construction of dams, civilization, logging et cetera drastically reduce the biodiversity of a forest.

This reduction of biodiversity forms the foundation for a secondary succession of a forest.

7 0
3 years ago
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