Prokaryotic genomes often contain a circular chromosome with hundreds of thousands of genes and highly repetitive DNA.
Answer the following statement true (T) or false (F)
False
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In a typical predator-prey relationship, ____
a. the predator exerts selective pressure on its prey b. the prey exerts selective pressure on its predator c. the predator will not kill its prey d. the predator feeds on carcasses e. predator and prey exert selective pressures on each other
Atlantic mollies of the species Poecilia mexicana live in habitats that make multiple collection trips difficult, yet they live in populations of many small individuals. What variable was measured to estimate and compare their life histories among different conditions?
A. embryo biomass
B. embryo number and embryo biomass
C. embryo number
D. ages of the collected male and female Atlantic mollies
E. numbers and sizes of the collected male and female Atlantic mollies
Match the following letters to the number with which
they best correspond. a. Observation, b. Question, c. Hypothesis, d. Prediction, e. Observational experiment, f. Laboratory experiment, g. Assess results, h. Report 76. ____ Conduct a survey of individuals who smoke and individuals who do not smoke. Determine which group has the highest incidence of cancers. 77. ____ If smoking causes cancer, then individuals who smoke will get cancer more often than those who do not. 78. ____ Submit the results and the conclusions to the scientific. 79. ____ Establish identical groups of laboratory rats. Expose one group (the model system) to cigarette smoke and compare the incidence of new cancers (if any) with the incidence in the control group. 80. ____ Compile test results and draw conclusions from them. 81. ____ Smoking cigarettes may cause cancer. 82. ____ Why do people get cancer? 83. ____ People get cancer.
What hormone stimulates the milk-ejection reflex?
A. Aldosterone B. Parathyroid hormone C. Antidiuretic hormone D. Oxytocin E. Vasopressin