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3 years ago

Diffusion can be fined as what

Biology

1 answer:

serious [3.7K]3 years ago

7 0

Answer:

Diffusion can be defined as the net downward movement of given substance like ions from higher concentration to an area of lower concentration. It can occur in any medium

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Bacteria multiply by division. One bacterium becomes two. Then two divide into four, the four divide into eight, and so on. For

Leto [7]

Answer:

1) By 11:30pm

2) Shortly before midnight (few minutes to 12:00am)

Explanation:

Since the strain of bacteria takes 1 minute to divide (double its population), and by midnight (12:00am) the entire bottle becomes full, then:

I) Subtract Initial division time from Final division time i.e 12:00 - 11:00 = 1 hour

II) Split 1 hour into two (60minutes makes 1 hour)

I hour/2 = 30 minutes

Definitely, the bottle will be half filled by 11:30pm

2) Once half filled, the rapidly dividing cells reach for the top of the bottle as midnight approaches. By 11:50pm upwards, bottle space must have been running out

5 0

3 years ago

Plz help me well mark brainliest if correct!!

sammy [17]

Answer:

Explanation:

The Greenhouse effect occurs when heat from pollution is trapped in Earth's atmosphere.

3 0

3 years ago

Jonathan designed an experiment to plant lima bean seeds. His variable was to change what kind of light each plant received. He

sergejj [24]

Answer:

Yes, it was.

Explanation:

The data did support the hypothesis because the data given was generalized on the change of light each plant received. The hypothesis was that the plant light would have the greatest amount of growth. The data was the different light types and the hypothesis was which one he inferred would work best.

4 0

3 years ago

How might biodiversity in Area 1 change if the new bird species ate small mammals, lizards, and toads?

zmey [24]

Knowing that Biodiversity is the variety and variability of life on Earth. Biodiversity is typically a measure of variation at the genetic, species, and ecosystem level. Terrestrial biodiversity is usually greater near the equator, which is the result of the warm climate and high primary productivity. The ecosystem will change if a new species is introduced to an unfamiliar ecosystem. If a new species of birds were to eat another animal that was supposed to be eaten by another. The food chain of the ecosystem would be changed drastically. Aka, it might make the lizards go extinct, and can possibly become abundant. Aka, overpopulating and creating havoc within the ecosystem. Thus, causing imbalance.

8 0

3 years ago

A 5-year-old boy has become increasingly lethargic for past 2 months. Bruising is noted on the skin of his lower legs. Hb 9.2 g/

mart [117]

Answer:

Acute Lymphoblastic Leukemia (ALL)

Explanation:

The 5 year old, male patient is most likely suffering from Acute Lymphoblastic Leukemia.

INTRODUCTION:

Acute Lymphoblastic Leukemia is also known as acute lymphocytic leukemia and acute lymphoid leukemia. It is the most common cancer of children.

This disease is marked by neoplasm composed by blast cells. Blast cells are immature B or T lymphocytes.

PATHOPHYSIOLOGY:

Blast cells are marked by scant cytoplasm, larger than usual nucleus, inconspicuous (small) nucleoli and delicate chromatin. These cells stain positive for Tdt marker ( terminal deoxynucleotidyl transferase). Tdt marker is absent in mature lymphocytes but present in immature lymphocytes and acute lymphoblastic leukemic cells. Majority of ALL cells stain positive for CALLA. CALLA stands for common acute lymphoblastic leukemia antigen. CALL is also known as CD 10 (cluster of differentiation 10).

The blast cells infiltrate the bone marrow and replace it. Since RBCs are produced by the bone marrow, pathological infiltration results in the decrease in the number of RBCs produced. This may manifest as anemia with decreased Hemoglobin concentration on complete blood count/ blood complete picture test. Platelet level will also be decreased due to bone marrow infiltration. Sometimes complete blood counts may reveal increased amounts of WBCs by counting immature blast cells as WBCs.

Decreased RBCs present as symptoms of anemia with patient complaining of fatigue and lethargy. Decreased platelet counts may result in bruising on skin as the ability to heal trivial wounds is decreased.

QUESTION:

Coming back to the question, there are many cues which point towards this diagnosis.

The age of the patient i.e. 5 years old implies us to consider pediatric diseases. ALL is the most common cancer occurring in children.

Lethargy warns us to consider anemia in the patient.

Bruising points towards decreased platelets in this patient. Low blood platelet count is called thrombocytopenia.

Hb 9.2 g/dL, Hct 27.8%, MCV 91 fL confirm anemia (Normal values in children; Hgb 11-13 g/dL, Hematocrit 34%, MCV 75-90 fL) and platelet count 101,000/µL establishes thrombocytopenia (normal platelet count is 150,000-450,000 per microliter). WBC count 12,128/µL is normal ( normal values in 4-7 years children 6,000-15,000 cells per microliter) in this patient.

Replacement of bone marrow by primitive cells with large nuclei, delicate chromatin; indistinct nucleoli with scanty cytoplasm is a typical feature of Acute Lymphoblastic Leukemia.

Positive staining for CALLA establishes acute lymphoblastic leukemia in this patient as this antigen is positive in ALL cells and this disease is also implied by the symptoms, history and laboratory tests of the patient.

3 0

3 years ago

Diffusion can be fined as what​

Diffusion can be fined as what