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Q Beings from four phyla of the animal kingdom "breath" (do gas exchange) by diffusion. Which are those phyla? How is this type of respiration associated to features present in those animals?
The phyla of the animal kingdom whose beings do gas exchange by diffusion are the cnidarians, the poriferans, the platyelminthes (flatworms) and the nematodes (roundworms). This type of respiration in these beings is possible because their cells and tissues are relatively close to the exterior.
Describe the factors that are involved in the regulation of respiration in a child who decides to hold his/her breath for as long as possible.
The PCR (polymerase chain reaction) is a biochemical technology in molecular biology to intensify a one or a little copies of a piece of DNA across several orders of magnitude gene
As a result of mutarotation, D-glucose exists in all of the following forms EXCEPT: Select one: a. L-glucopyranose. b. alpha-anomer. c. free aldehyde (linear) d. bet
What is the clitellum of earthtworms and where it is located? The clitellum is a special region of the annelid constituted by rings (metameres) with reproductive function. It c
wath is sun
Biological Responses Controlled by Phytochrome Phytochrome responses are those which are controlled reversibly by red and far-red light. These can be broadly categorised as:
thermophillic micro-organisms
In a numeric pyramid to which trophic level does the base always refer? What about the top level? In a numeric pyramid the base corresponds to the first trophic level, i.e., to
Name three characteristics of mitochondria and chloroplasts that support the endosymbiotic hypothesis of eukaryotic evolution. Both organelles replicate independently of the ce
The fundamental contractile unit is the sarcomere. Each muscle cell apart from the nucleus, mitochondria and other structures contains parallel fibrils. Sarcomere is a subunit of t
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