Heritability of a trait can change because

A) genes mutate.

B) the environment can change.

C) a person can consciously change her or his heritability.

D) the heritability in a family changes with the number of children.


B) the environment can change.

Biology & Microbiology

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The lower the basic reproduction number of a pathogen, the higher the percentage of immune individuals necessary to provide herd immunity

Indicate whether the statement is true or false.

Biology & Microbiology

Many spirochetes are difficult to cultivate, so their classification is based on their

A. morphology and ability to cause disease. B. number of flagella. C. pattern of pili. D. number of chromosomes.

Biology & Microbiology

Which of the following is properly matched?

A. Osteoblasts and bone breakdown B. Osteocytes and initial bone formation C. Osteoclasts and initial bone formation D. Osteoclasts and bone breakdown E. Osteoblasts and cartilage formation

Biology & Microbiology

You have been given a plant sample and asked to identify a specific tissue. Upon investigation, you find the cells are all long in length and some of them have small pores. They all contain fluid. You test the fluid using various biochemical tests and discover the fluid contains an abundance of disaccharides. What type of tissue are you looking at?

A. Phloem B. Meristematic C. Sclerenchyma D. Root hair cells E. Xylem

Biology & Microbiology