Mathematics, 30.01.2020 01:50 janiyaf8941
1) what is one type of white blood cell that participates in the specific immune response called?
a) antigens
b) antibodies
c) macrophages
d) pathogens
2) which statement best describes one way that both plants and animals fight pathogens?
a) both have an antigen–antibody response.
b) both have a protective outer layer.
c) both produce lymphocytes.
d) both have a lymphatic system.
Answers: 2
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Rachel is studying the population of a particular bird species in a national park. she observes every 10th bird of that species that she can find in the park. her conclusion is that the birds living in the park who belong to that species generally feed on insects. rachel's sample is . based on the sample she picked, rachel's generalization is
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According to a research study, parents with young children slept 6.4 hours each night last year, on average. a random sample of 18 parents with young children was surveyed and the mean amount of time per night each parent slept was 6.8. this data has a sample standard deviation of 0.9. (assume that the scores are normally distributed.) researchers conduct a one-mean hypothesis at the 5% significance level, to test if the mean amount of time parents with young children sleep per night is greater than the mean amount of time last year. the null and alternative hypotheses are h0: ÎĽ=6.4 and ha: ÎĽ> 6.4, which is a right-tailed test. the test statistic is determined to be t0=1.89 using the partial t-table below, determine the critical value(s). if there is only one critical value, leave the second answer box blank.
Answers: 3
1) what is one type of white blood cell that participates in the specific immune response called? <...
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