Indirect development in sea urchins involves the presence of a _________________ stage.
Fill in the blank(s) with the appropriate word(s).
larval
Biology & Microbiology
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Which term refers to a particular set of alleles an organism carries?
a. Gene b. Phenotype c. Homozygous d. Heterozygous e. Genotype
Biology & Microbiology
Which system(s) control digestion?
a. the nervous system b. the endocrine system c. both the nervous and endocrine systems d. the lymphatic system e. both the nervous and lymphatic systems
Biology & Microbiology
The amount of ultraviolet radiation hitting the Earth's surface is greatly reduced by which gas in the atmosphere?
a. ozone b. oxygen c. water d. carbon dioxide e. nitrogen vapor
Biology & Microbiology
Which organelle breaks down organelles that are no longer useful?
A. Golgi apparatus B. lysosome C. endoplasmic reticulum D. mitochondria
Biology & Microbiology