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According to the theory of natural selection, what factor below contributed to the current variations in beak sizes of finch species on the Galapagos Islands? a. Finches dispersed to islands where their beak sizes closely matched available seed sizes b. Different finch populations needed to change in order to survive, so beneficial new traits arose c. Non-heritable variation between individual was important for natural selection to work d. Genetic drift allowed beneficial traits to spread throughout the population e. Seeds are limited resource.
If carbon 1 is the carbonyl group of a 6-carbon aldose (aldohexose), which carbon determines if the sugar is a D- or L- stereoisomer? Select one: a. 1 b. 2 c. 3 d. 4
Q. Which are the cell organelles that participate in cell division and in the formation of cillia and flagella of some eukaryotic cells? The organelles that participate in the
For a sarcomere of a skeletal muscle, define the following terms: A is the length of the A Band; H is the length of the H Zone; I is the total length of the I Bands in the sarcomer
How many asymmetric carbons does the amino acid serine have? Please explain with a strucutral diagram if possible.
Define Signs and symptoms of iron deficiency anaemia? Since the level of haemoglobin is reduced in the blood, it causes paleness (pallor) on certain parts of the body. Initiall
Q. What are the four major groups into which the study of the plants is divided? In Botany the plant kingdom is divided into pteridophytes, bryophytes, angiosperms and gymnospe
Define phases of the absorption of iron? The process of absorption is divided into three phases: i) Iron uptake by enterocytes (epithelial cell of the superficial layer of t
Breifly describe the Menstrual Cycle? Each month during a female's reproductive years, the hypothalamus secretes a hormone that stimulates the anterior lobe of the pituitary gl
What is the part of the female reproductive system where fecundation occurs? Fecundation generally happens in the Fallopian tubes but it can also take place within the uterus.
Q. What do energy pyramids represent? The Energy pyramids represent the amount of accessible energy in each trophic level of the food chain.
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