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Paha777 [63]
2 years ago
15

Who discovered the advantages of AC over DC( alternating current and direct current)?

Biology
1 answer:
stira [4]2 years ago
8 0

Answer:

At the close of the nineteenth century, Thomas Edison was working on perfecting his system of direct current (DC) for electric power distribution. Meanwhile, the inventor and physicist Nikola Tesla was discovering the benefits of his competing alternating current (AC) system.

Explanation:

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During the course of a physical exam, a physician suspects his patient may be depressed. In order to explore this diagnostic pos
tangare [24]

Answer: asked the patient two questions about feelings of hopelessness and feelings related to the enjoyment of activities

Explanation:

Hopelessness is an emotional context featured by a lack of hope, passion, and optism. It is expressed as a symptom of varying behavioral and mental health problems, including depression, bipolar, anxiety, eating disorders and among others.

In the other hand, the test on feelings related to enjoyment was done to evaluate the the emotions of pleasure from the individual’s engagements.

However, the physician carried out the two tests on his patient to know whether he's depressed or not.

6 0
3 years ago
Which of these processes does not require the cell to use energy A cell division b protein synthesis c DNA replication D diffusi
weeeeeb [17]

Answer:

D diffusion across a membrane

Explanation:

Based on whether or not energy input is required, there are two types of processes viz: passive and active. Passive processes are those that do not require energy input in form of ATP while active processes require energy input to occur.

An example of passive process is DIFFUSION, which is the movement of molecules from a region of high concentration to a region of low concentration across a membrane. Diffusion is passive i.e does not require energy, because movement occurs down a concentration gradient.

Other processes in the options like cell division, DNA replication and protein synthesis all require energy input to occur.

6 0
3 years ago
5. In humans, normal skin pigmentation is due to a dominant allele (A), while the recessive allele (a) causes albinism (lack of
MrRa [10]

Answer:

There are 2 possible punnett squares. In the case Kendal is a carrier, cross Aa with aa for Kent. In the case Kendal is not a carrier, cross AA with aa.

7 0
3 years ago
Complete the sentences to describe natural selection
Vikentia [17]
  1. The environment needs to change in order to natural selection to occur.

Reason:

Because, Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the change in the heritable traits characteristic of a population over generations.

2. Population has some genetic variations.

Reason:

Genetic variation is essential for natural selection because natural selection can only increase or decrease frequency of alleles that already exist in the population. Genetic variation is caused by:

mutation and random mating between organisms

3. Nature select organism with specific traits to survive and reproduce.

Reason:

According to Charles Darwin's theory of evolution by natural selection, organisms that possess heritable traits that enable them to better adapt to their environment compared with other members of their species will be more likely to survive, reproduce, and pass more of their genes on to the next generation.

6 0
3 years ago
All the different plant populations make up the plant ___________ in this swamp. The plants are part of the bigger __________, t
hodyreva [135]
I the answer is C. A community is more than one individual organism or animal and a ecosystem is the study of how an organism or animal is interacting with others
5 0
3 years ago
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