Sponge cells capture nutrients in the form of _____ by the process of _____
A. macromolecules; diffusion and active
transport
B. food particles; diffusion and active
transport
C. macromolecules; endocytosis
D. food particles; endocytosis
E. micromolecules; diffusion and active
transport
D
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In eukaryotes, precursor mRNA molecules are processed in the
A) ribosomes. B) nucleus. C) mitochondria. D) cytoplasm. E) nucleolus.
Which of the following statements about plant macronutrients is/are true? (Check all that apply.)A) They approach or exceed 1% of a healthy plant's dry weight.B) They reduce the need for CO2 during photosynthesis.C) A deficiency in any one can have severe effects on a plant's growth.D) The amount of a macronutrient needed by a plant can be assessed by growing plants in hydroponic solutions.
What will be an ideal response?
You are an engineer at a power plant that creates large volumes of hot waste water, which disrupts the ecosystem of the river it drains into. Another part of the plant requires warm oil, and the plant uses large amounts of energy to heat it. Inspired by countercurrent exchange in whales, you save energy and benefit the environment by
A. running the oil pipes under the river after dumping in the hot waste water B. adding a sensor, integrating center and effectors to control temperature in both pipes C. running the oil pipes around the waste water pipes, to allow heat transfer from water to oil D. running the waste water and oil through a single pipe
Bacterial endospores are not produced by
A. Bacillus. B. Clostridium. C. Sporosarcina. D. Staphylococcus. E. All of these choices are correct.