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maria [59]
3 years ago
7

From which substance are antibiotics usually derived?

Biology
1 answer:
rodikova [14]3 years ago
5 0
Antibiotics are usually derived from bacteria.
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How does human impact on freshwater ecosystems by nitrogen cycle and environmental impact
Radda [10]

Answer:

Nitrogen is a critical limiting nutrient in many systems, including forests, wetlands, and coastal.

5 0
3 years ago
Choose the scientific question. A. Would you like to have a frog as a pet? B. Who is the smartest biologist alive today? C. Whic
TiliK225 [7]

Answer:

<em>The correct option is D)  How is the number of frogs in Massachusetts affected by pollution</em>

Explanation:

A scientific question can be described as a question which can be answered through the scientific method of research. Based on the scientific question, a hypothesis can be formulated. For example, for the option D, the hypothesis can be 'if the pollution increases, then the number of frogs decreases.' A hypothesis is a tentative statement which can be tested through experiments. Based on these experiments, results are formulated and conclusions are drawn. The question mentioned in option D can be answered through this method hence, it is the correct option.

7 0
3 years ago
What is Cytosine? Where is it located in the DNA? Who is it paired with? What is the role of Cytosine?
Natalija [7]
One of the 4 nucleic acid bases. They connect the two strands of the DNA double strand by means of hydrogen bonds, the principle of so-called complementarity of bases. derived from pyrimidine. It is part of nucleic acids, where it forms a complementary pair with guanine using three hydrogen bonds.
5 0
2 years ago
Read 2 more answers
Which of the following correctly describes how nerve impulses move throughout the body?
ikadub [295]
The correct options are as follows:
1. ELECTRICAL TRANSMISSION THROUGH NEURONS AND CHEMICAL TRANSMISSION BETWEEN NEURONS [D].
Neurons, which are the nerve cells that carry nerve impulses are made up of cell body and dendrites. Electrical events propagate signals within a neuron and chemical processes transmit the signals from one neuron to the other.
2. SENSORY NEURON - BRAIN - SPINAL CORD - MOTOR NEURONS [B].
Waking up from sleep involves sensory neurons. Hearing of a strange sound is made possible by the activity of the brain. The man become alarm as a result of the message to the body from the brain via the spinal cord and running  involves motor neurons.
3. MOTOR NEURONS AND SENSORY NEURONS [A].
The peripheral nervous system is one of the two components of the nervous system and is made up of the nerves and the ganglia outside the brain and the spinal cord. The neurons of the peripheral nervous system is made up of sensory and motor neurons. The sensory neurons bring signals to the central nervous system while the motor neurons carry signals out of the central nervous system.
7 0
3 years ago
Why are there no carriers with dominant pedigrees?
elena-14-01-66 [18.8K]
You can't have a carrier with a dominant pedigree because other wise than individual or organism would be afflicted by the gene and render them incapable of being a carrier. A carrier is an individual/organism that has a normal phenotype (meaning it is not afflicted by said gene) but is carrying the gene that could cause disease or whatever the affect may be. In this case the gene would have to be homozygous recessive to be expressed. Hopefully this helps! 
7 0
3 years ago
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