Some ciliophora can discharge toxic threadlike darts called ________, which are used in capturing prey.
A. toxicysts
B. toxipodia
C. spicules
D. spikes
Answer: A
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What can scientists study in the fossil record to learn about the distribution of grasses in the past? Select all correct choices
A. herbivore teeth B. herbivore hooves C. stromatolites D. phytoliths E. the ratio of different carbon isotopes in fossils
In the biological sciences, the null hypothesis is usually rejected if the P value is _____
A. Greater than 1 B. Less than 0.30 C. Less than 0.95 D. Less than 0.05 E. Less than 1
Which mechanism of controlling gene expression occurs outside of the nucleus?
A) adding a cap and tail to RNA B) DNA packing/unpacking C) RNA splicing D) translation
Legume plants with reduced amounts of leghemoglobin would be expected to
A. be unable to form a symbiosis. B. be unable to form a nodule. C. fix more nitrogen than normal legume plants. D. fix less nitrogen than normal legume plants.