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lions [1.4K]
3 years ago
8

Every year the number of vehicles running on the roads is increasing. These vehicles release many harmful gases into the atmosph

ere. What effect does this have on living things? A) Plants cannot complete the process of photosynthesis. B) It causes respiratory disorders in humans and animals. C) Microorganisms thrive under these conditions and grow in number. D) The gases mix with rain and add more nutrients to aquatic ecosystems.
Biology
2 answers:
sleet_krkn [62]3 years ago
7 0
I believe the answer is b
Snezhnost [94]3 years ago
3 0
Its probably B because the pollution doesn't effect the suns rays
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For which of the following groups would the biological definition of species be useful? For which of the following groups would
Lesechka [4]

Answer:

B) oaks and other sexually reproducing, extant (currently living) trees

Explanation:

The biological species concept defines the species on the basis of their reproductive isolation. It states that when individuals are able to interbreed to produce fertile and viable progeny, they belong to the same species. The members of different biological species cannot interbreed. If they interbreed, either pre-zygotic or post-zygotic isolation mechanisms do not allow the production of fertile progeny.

Therefore, the biological species concept can be applied to the organisms that are able to reproduce sexually. The asexually reproducing organisms would not exhibit any reproductive isolation which is a key criterion to group organisms under different species. Among the given examples, biological species concept can be applied to the sexually reproducing extant trees such as oak.

Since we cannot deduce the reproductive isolation in sexually reproducing extinct species, the concept is not useful for dinosaurs which are extinct now.

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2 years ago
Describe the most common molecular mechanism for recessively inherited human genetic diseases such as cystic fibrosis.
Marta_Voda [28]

Answer:

Explanation:

cystic fibrosis is an autosomal recessive disorder. When the child receives the defective gene from both of his parents, he suffers from cystic fibrosis. Because his parents are carriers. In recessive genetic disorder, the genes will be expressed when both recessive genes are present in one person. The person suffering from this disease have a lung infection and pancreatic dysfunction.  

In this cystic fibrosis, genes are located in chromosome 7. The effective gene is the CFTR gene. The CFTR gene is present in the DNA and by transcription, this forms CFTR protein. This is a channel protein and transports chloride ion.

This CFTR protein transports chloride ions and it makes a balance in the cell membrane. These genes are commonly present in the epithelial cells. Outside the epithelial mucus is present to keep the cells moist.

The epithelium gets a lack of water and chloride due to the defect. Therefore cells need CFTR proteins also. This causes lung infection and pancreatic disorder.

6 0
3 years ago
In which state is a plant cell healthiest ?
Alex17521 [72]

Answer:

Hypotonic

Explanation:

At this point, the cell is turgid (very firm), the healthy state for most plant cells. Plants that are not woody, such as most houseplants, depend for mechanical support on cells kept turgid by a surrounding hypotonic solution

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3 years ago
How do the retinas of the eyes of night-hunting animals differ from the retinas of animals that hunt during the daytime?
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A) They have more cell rods... hope it helps :)
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3 years ago
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What do we call a life-form that is so small we need to look at it through a microscope in order to see it?
avanturin [10]
A Microorganism which can also be known as a Microbe or Microscopic organism
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3 years ago
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