Invertebrates have an adaptive immune system and an innate immune system
Indicate whether the statement is true or false.
ANS: F, do not have an adaptive immune system, but do have an innate immune system.
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Which statement is true of Glomeromycota?
a. They have DNA suggesting a polyphyletic lineage. b. They were the earliest fungi to reproduce sexually. c. They cannot exist without the presence of tree roots. d. They taste delicious in many popular types of cheese.
Which bone forms the lower sides of cranium and surrounds the ear canal?
a. frontal b. mandible c. sphenoid d. temporal e. occipital
In a hormone-stimulated signaling system, the concentration of hormone exposed to the receptor is
A) always equal to the receptor Kd for binding the hormone. B) never equal to the receptor Kd for binding the hormone. C) below the receptor Kd for binding the hormone before stimulation of hormone secretion. D) above the receptor Kd for binding the hormone before stimulation of hormone secretion. E) always constant.
The chance of an organism being preserved as a fossil is very low
a. true b. false