BIOLOGY HIGH SCHOOL

Identify one way the immune system fights pathogens

Answers

Answer 1
Answer: The T-cells and B-cells. T-cells come from the Thymus gland while B-cells come from the bone marrow. T cells are responsible for cell-mediated immunity while B-cells are based on humoral immunity. Both are known as lymphocytes.

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In which body of water with mangroves most likely be found

Answers

Mangroves are most likely to be found in brackish water. Brackish water is more saltier than freshwater but it doesn't quite reach the level of seawater. Fun fact mangroves are called halophytes.

If u have no white blood cells left, what does this mean?

Answers

White blood cells fight infections from bacteria, viruses, fungi. and other pathogens (organisms that cause infection). One important type of white blood cell is the neutrophil. These cells are made in bone marrow and travel in the blood throughout the body. They sense infections, gather at sites of infection, and destroy the pathogens.

When the body has too few neutrophils, the condition is called neutropenia. This makes it harder for the body to fight off pathogens. As a result the person is more likely to get sick from infections. In general, an adult who has fewer than 1,000 neutrophils in a microliter of blood has neutropenia.

If the neutrophil count is very low, (fewer than 500 neutrophils in a microliter of blood), it is called severe neutropenia. When the neutrophil count gets this low, even the bacteria normally living in a person's mouth, skin, and gut can cause serious infections.
White blood cells fight bacteria so, with no white blood cells you have a higher risk of infection and a low white blood call count can give you Leukopenia  and Neutropenia

Which structures are found in eukaryotic cells?

Answers

Oh! Just did this in school!
Eukaryotic cells are more complicated than prokaryotic. Eukaryotic cells have DNA in their nucleus, they have more than one chromosome, lysosomes, preoxysomes, mitochondria, cytoskeleton, golgi apparatus

What discovery led Darwin to develop his theories on adaptation?a.
The Galapagos islands contain a range of habitats.
b.
The Galapagos islands originate from volcanoes.
c.
The birds Darwin found in the Galapagos were different types of finches, not separate types of birds.
d.
Many of the organisms in the Galapagos lived in hostile environments.

Answers

The answer is C. During one of his explorations, naturalistCharles Darwin reached the Islands of the Galapagos. He observed that there arethe same species of animals on different islands, but have noticeabledifferences. He found in Galapagos, that there were finches, a type of bird,with different type of beaks. Birds used their beaks to acquire food. It ledhim to discover that species developed over time to fit their way of life insurviving and getting their food.

The correct answer form all of the given options is (c) The birds Darwin found in the Galapagos were different types of finches, not separate types of birds.

Further explanation:

Adaptation theory given by Charles Darwin is also called survival of the fittest theory or just survival theory, it explains the ability of the organism to adapt to the changes of the environment over generations and give rise to new form of species.

Darwin named this theory natural selection stated that;

  • Adaptation is the survival process through which species become suited to the surrounding environmental changes. There is process called genetic variation in which species with best suited genes or characteristics has better chances to survive and reproduce.
  • Over a period of several generations the genetic make-up of the surviving species will slowly change and become completely adapted to the need of the physical environment.
  • Some of the most important distinguished feature Darwin noticed regarding different species was found on nearby island of Galapagos which had similar but not identicalspecies of finches living on them, each finches species had distinguishable feature but they are adeptly suited to their respected environment. Some of them had large and tough beak whereas others had sharp and thin beak. Finally he noticed that finches found on the Galapagos island were similar to mainland Ecuador but different form elsewhere.
  • Darwin furthermore noticed the turtles from two different islands one turtle population had short legs and they ate food that was low on the groundand the other one had long legs because the food source was much higher up. So the theory was that when the turtle migrated to another island in the search of food, there the food source was much higher up so, the turtle with long legs survived and evolved.

There is internal adaptation as well which cannot be seen from outside the body for example vertebrates adapting to regulate their body temperature.

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Answer Details:

Grade: High school

Subjest: Biology

Chapter: Darwin’s theory of evolution  

Keywords  

Finches, adaptation, species, natural selection, characteristics, genes, genetic variation, Galapagos.

If carbon dioxide is needed photosynthesis and water is plentiful, which of the following is likely to occur? A. Additional water will be gained and the plant cells will become rigid. B. The stomata will open until too much water is lost. C. Water pressure is going to decease in the guard cells. D. The stomata will close until enough water is lost.

Answers

Remember, if CO2 (which is a gas) is needed, then the stomata must open up to let in air. This limits your answers to A and C. If you have plenty of water, how would too much water be lost? I think you can figure out the answer from that.Let me know if this is clear and helps or not.
A : Additional water will be gained and the plant cells will become rigid 
B : The stomata will open until too much water is lost 
C : Water pressure is going to decease in the guard cells 
D : The stomata will close until enough water is lost 

The answer D : The stomata will close until enough water is lost 

Which of the following is mainly responsible for the removal of carbon dioxide from the atmosphere? A. animals B. factories C. soil D. plants

Answers

Answer:

D. Plants

Explanation:

They get the Carbon Dioxide for photosynthesis
The Answer would be D, plants take in carbon dioxide during the day and release oxygen. In a process called “photosynthesis,” plants use the energy in sunlight to convert carbon dioxide and water to sugar and oxygen.
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