How can a person donate blood and never run out of it?A. Blood components are continuously pumped by the heart.
B. Blood components are continuously circulated through the blood vessels.
C. Blood components are continuously produced in the bone marrow.
D. Blood components are continuously digested by enzymes.

Answers

Answer 1
Answer:

Answer: The correct answer is- C. Blood components are continuously produced in the bone marrow.

Formation of blood cells is a continuous process that occurs in the bone marrow ( a gelatinous, soft tissue present within bones) of adults.

This process is called as hematopoiesis, in which undifferentiated precursor cells ( also called stem cells) are developed and differentiated into particular blood cell type ( having specific function).

Thus, through this continuous process, all the components of blood can be replenished whenever they are required.

Therefore, when a person donates blood, he never run out of it.

Answer 2
Answer: blood components are continuously produced in the bone marrow

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How many wings do housefly have?

Answers

Answer:

one pair

Explanation:

Houseflys are like Diptera

Final answer:

Houseflies have two wings.

Explanation:

Houseflies, like many other insects, have two wings. These two wings are the primary flight appendages of the housefly and are attached to the thorax, the middle section of the insect's body. The presence of two wings is a characteristic feature of the order Diptera, to which houseflies belong.

The two wings of a housefly are typically transparent and membranous, allowing for flight. In addition to their two wings, houseflies also have two small, club-shaped structures called halteres located behind the wings. Halteres serve as sensory organs and are essential for the housefly's stability and balance during flight.

The presence of two wings and two halteres is a defining characteristic of true flies, which are members of the order Diptera. These wings play a crucial role in the housefly's ability to fly and are an integral part of their anatomy.

Learn more about Houseflies

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The number of individuals that live in a specific area is called

Answers

the name for it is population
The number of individuals that live in a particular area is called population.

Which of the following does NOT have a part in controlling the balance of an ecosystem?Consumers
Decomposers
Sun
Producers

Answers

Sun is the correct answer.
.

After a several-years drought, smaller seeds became scarce, but drought-resistant trees continued producing larger seeds. What graph would BEST predict the change in beak length of the bird population?

Answers

Answer:

To predict the change in beak length of the bird population based on the scenario described, a line graph would be the most appropriate.

A line graph is a type of graph that displays data points connected by lines, showing the relationship between two variables over time. In this case, the x-axis would represent the years (time) and the y-axis would represent the beak length.

By plotting the beak length data over the years on a line graph, you can observe the trend and track the changes in beak length as the availability of smaller seeds decreased and larger seeds from drought-resistant trees became more prevalent. The line graph would allow you to visualize the overall pattern and any fluctuations in beak length over time.

This type of graph would be useful in showing the continuous change in beak length and how it correlates with the availability of different seed types. It would help in identifying any trends or patterns in the bird population's beak length response to the drought and the change in seed availability.

Explanation:

Answer:

Explanation:

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Explain the characteristics scientists use when observing organisms and placing them in the six kingdoms .

Answers

The characteristics that scientists used to classify living organisms into six kingdoms include the following:
1. Cell type: living organisms are classified into prokaryotes and eukaryotes based on the presence of nucleus and distinct arrangement of the organelles in their cells.

2. Mobility: living organisms are categorized into kingdoms based on their ability or inability to move about.

 3. Cell structure: the cells structure was used to divide living organisms into plants and animals. Those living organisms that have cell wall are classified as plants while those who do not have cell wall are classified as animals.

4. Number of cells: living organisms that are made up of only one cell are classified as unicellular while those with many cells are termed multi cellular.

 5. Reproduction method: living organisms are classified based on whether they reproduce sexually or asexually.

6. Manner of obtaining energy: living organisms that can prouduce their own food are called autotrophs while those that can not produce their own foood are termed heterotrophs. Plants are essentially categorised as autotrophs while animals are described as heterotrophs.

Answer:

cell type – prokaryotic or eukaryotic

cell structure – cell wall

nutrition – autotrophic or heterotrophic

body type – unicellular or multicellular

Explanation:

on edg 2021

How the combination of electrons, protons ans neutrons results in the neutral charge of an atom?

Answers

Hi :D
Neutrons are neutral so they have no charge. Electrons have a negative charge and protons have a positive charge.
For an atom's charge to be neutral there has to be an even amount of protons and electrons in the atom.