A blood vessel one cell thick for absorption of nutrients and removal of wastes isa. a vein.

b. an artery.

c. a capillary.

d. the pulmonary artery.

Which type of radioactive decay produces particles with a positive charge and very small mass?

Brianna is mapping trees in a section of land. She observes that some of the trees are clumped together, some are uniformly separated, and some appear to be spaced randomly. What is she describing?

Why is a dominant allele called dominant? A. There is always at least one dominant allele. B. There are always more dominant alleles in a genotype. C. The dominant alleles are the only kind that determine phenotype. D. It dominates the phenotype.

Which molecule can pass freely through the lipid bilayer? A) K+ B) Na+ C) O2 D) glucose

Based on duration or persistence how diseases are categorized

Why do scientists use indirect methods to study the ocean floor? answer?

Which characteristic distinguishes the five groups of fungi? number of cells reproductive structure type of hyphae method of feeding

Which of the following occurs while homologous chromosomes are paired up? A. They create 2 haploid cells. B. They contain 6 chromatids. C. They exchange portions of their DNA. D. They produce two diploid cells.

Pinocytosis is an example of

Gases such as oxygen and carbon dioxide cross the plasma membrane by