Biol 141 Study guides, Class notes & Summaries

Difference between a hypothesis and scientific theory? - Hypothesis - testable statement to explain a phenomenon Scientific Theory -well-substantiated explanation of some aspect of the natural world, based on knowledge that has been repeatedly confirmed through observation and experimentation Hypothesis and prediction? - Prediction describes a measurable or observable result that must be true if hypothesis is valid What kinds of hypotheses are useful for scientific investigations that try ...

Practice Exam for BIOL 141 Exam 2 with 100% correct answers The semi-fluid matrix that surrounds organelles in a cell is called the - answercytoplasm A distinctive feature of eukaryotes is the organization of tightly packaged chromosomal DNA with proteins into a membrane-bound structure called a - answerNucleus The organelle that can collect package modify and transport molecules is called the - answerGolgi Apparatus or body The evolutionary process that created chloroplasts and mitochond...

The Pre-embryonic period - Consists of the first two weeks in the forms: - Zygote (1 cell; diploid) - Morula (72 hours) - Blastocyst (5 days) Morula - At 72 hours of gestation - solid ball of 16-32 cells (called blastomeres) - the size of an ovum/zygote due to in favor of rapid cleavage division (for optimal surface area and waste removal) over growth. Blastocyst - 5 Days Gestation Features: - fluid filled cavity (blastocoel or blastocyst cavity) - inner cell mass (becomes the embryo)...

integumentary system includes ___ - skin hair nails glands nerves (sensory receptors) skin consists of ___ - epidermis and dermis epidermis - epithelial tissue derived from the ectoderm stratified squamous epithelium acascular dermis - connective tissue (proper) derived from mesoderm vascular contains nerves, glands, and hair follicles layers of epidermis beautiful skin gets lovely compliments - stratum basale, stratum spinosum, stratum granulosum, stratum...

Sebaceus glands are - Answer-epithelial tissue The epidermis of skin - Answer-contain melanocytes in the stratum basale and form the matrix of the hair follicle, the site of hair growth Dermis contains - Answer-arrector pilli muscle, hair root plexus, collagen, sweat glands Only Cervical vertebrae have - Answer-transverse foramina Pelvic girdle consists of - Answer-Acetabulum and ischial tuberosity Both the diaphysis and epiphysis of a long bone - Answer-can be located on the tibia and uln...

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