________ is the source of the oxygen gas released by a photosystem
A) H2O
B) Chlorophyll a
C) CO2
D) C6H12O6
A
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Which of the following procedures may be used to map genes in a fungi with an unordered tetrad ascus?
A. Testcross B. Monohybrid cross C. Dihybrid cross D. Chi-square analysis E. Analysis of interference
Plankton are floating communities of helminths.
Answer the following statement true (T) or false (F)
The homeostatic interaction between the endocrine system and which other system is demonstrated by
aldosterone regulating salt-water balance? a. digestive system b. circulatory system c. reproductive system d. urinary system e. skeletal system
In angiosperms, the process of ________ ensures that the endosperm will develop only in ovules containing a fertilized egg
A) cytogenesis B) meiosis C) double fertilization D) fragmentation