An 80 year old man is seen for an annual physical examination. He complains of shortness of breath on exertion and is often tired. His stool is black. Laboratory data are:

Haemoglobin: 8.2 g/dL

Haematocrit: 30%

White cell count: 4.2 x 109 one/L

White cell differential:

Neutrophils: 60%

Lymphocytes: 31%

Monocytes: 7%

Eosinophils: 2%

Basophils: 0%

Red cell count: 4.0 x 1012/L

RDW: 20%

Platelet count: 400 x 109/L

Reticulocyte count: 1.2%

Stool occult blood: Positive

1. How would you classify this anaemia morphologically?

2. What is the most probable type of anaemia seen in this patient?

3. What is the likely cause of the complaints of shortness of breath reported in this patient?
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Which of the following descriptions of proteins are true? i. proteins can have different sequences of amino acids. ii. proteins can have different shapes. iii. proteins can have different numbers of amino acids. a. only i and ii are true. b. only ii and iii are true. c. only i and iii are true. d. i and ii and iii are all true. e. none are true statements

Zoe decided to measure the hand length of each of her classmates. first she marked a line across each student's wrist and lined up a ruler from this mark to the top of the middle finger to measure the length. then she recorded the measurements in the table below. marla did this the same way for each classmate, and then zoe used this ruler to measure each straight line and record the data below. this data is invalid. what is the most likely reason why it is invalid? the ruler is marked in centimeters, but zoe recorded data in inches. the range of lengths is too wide, so zoe must have misread the ruler. marla’s complicated measuring procedure was overly confusing. marla could have been inconsistent while drawing outlines of fingers.

Organisms are classified, or grouped into categories, based on similarities in their characteristics and/or evolutionary relationships. the study of how organisms are classified is known as