Which strategy is most effective for larger cells to have an effective surface area to volume ratio?
a. locomotion
b. being short and fat
c. having thin, finger-like projections
d. having a thinner plasma membrane
e. having a completely spherical shape
c
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Which of the following statements best describes the clonal selection theory?
a. B cells differentiate into plasma cells and T cells. b. An antibody is flexible and can change shape to bind different antigens. c. An individual contains a single type of B cell. d. Each B cell can produce many types of antibodies, each of which reacts with a different antigen. e. An individual contains many types of B cells, and each secretes only one kind of antibody.
Which soil horizon is composed of organic litter?
a. O Horizon b. A Horizon c. B Horizon d. C Horizon e. Bedrock
Mendel's Principle of Independent Assortment, in modern terms, is the idea that _____
1.maternally derived chromosomes tend to segregate into gametes as a group, independently of the paternally derived chromosomes 2.each allele pair segregates into gametes without being influenced by the manner of segregation of other allele pairs 3.homologous chromosomes are separated during Meiosis I 4.homologous chromosomes segregate independently so that some pairs remain together and some do not
A(n) ________ is an organism that lives on or within another without killing the host
Fill in the blank(s) with correct word