Members of the genus Rhizobium, when growing symbiotically within root nodule cells, are referred to as ________.
Fill in the blank(s) with the appropriate word(s).
bacteroids
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A new plant nutrient is discovered that is needed at 5g/kg of plant dry matter and is required for photosynthesis. When this nutrient is added to the plant as a fertilizer, plant growth increases in comparison to a control group that did not receive the nutrient fertilizer.This nutrient is: (check all that apply)
_____ an essential element. _____ a macronutrient. _____ a micronutrient. _____ a limiting factor.
Identifying species based on evolutionary relationships is an example of the ____ concept
a. biological species b. ring species c. clinal variation d. morphological species e. phylogenetic species
Which of the following statements is NOT true
about asteroids? a. They have had little influence on the history of life. b. They do not emit light and are difficult to see. c. Their impacts have produced craters visible in satellite images. d. One asteroid impacted our planet just prior to the mass extinctions at the K-T boundary. e. An asteroid impact releases an enormous quantity of energy.
Gametes are what?
What will be an ideal response?