Embryos - Study guides, Class notes & Summaries

Bio 172 Animals Exam Questions With Verified Solutions **Which characteristic(s) is (are) unique to animals?** A) Structural carbohydrate, chitin B) Nervous and muscular tissue C) Heterotrophy D) Gametes ** Answer: B) Nervous and muscular tissue** **What feature do all deuterostomes share?** A) Adults exhibit bilateral symmetry B) Embryos develop pharyngeal pouches that may or may not form gill slits C) All possess a spinal column D) The blastopore formed during gastrulatio...

The cDNA prepared from cancer cells is labeled red and the cDNA prepared from normal tissue is labeled green. A DNA microarray experiment is performed, and it indicates that there are increased levels of expression of the gene dbl in the cancer cells compared to the normal tissue. What result indicated this? A) The spot corresponding to dbl is yellow. B) The spot corresponding to dbl is red. C) The spot corresponding to dbl is green. D) The spot corresponding to dbl is black. E) None of ...

charophytes - (aquatic) green algae land plants evolved from 3 key traits land plants share with charophytes - 1. rings of cellulose-synthesizing proteins embedded in plasma membrane 2. formation of a phragmoplast (helps form cell wall) 3. structure of flagellated sperm (not all will have this) adaptations enabling plants' move to land: why? - 1. CO2 2. sunlight 3. soil- nutrients 4. fewer predators/pathogens (never been seen before) adaptations enabling plants' move to land: pro...

Which claim is supported by the information in Graph 1 and Graph 2? A. The mass of the eggs and the number of eggs produced by sockeye salmon are independent of the females mass. B. The mass of the eggs produced by sockeye salmon depends on the female's average age at reproduction, but the number of eggs does not. C. The number of eggs and the mass of the eggs produced by sockeye salmon depend on the amount of matter stored by the female. D. The number of eggs produced by sockeye salmon ...

AP Biology Final Exam Review with Complete Solutions acquired immunity immunity that the body develops after it overcomes a disease, or through inoculation (such as vaccination) acrosomal reaction the discharge of hydrolytic enzymes from the acrosome, when the sperm contacts an egg action potential a neural impulse; a brief electrical charge that travels down an axon; the action potential is generated by the movement of positively charged atoms in and out of channels in the axon...

Individuals with variations that make them best suited to their environment are, on average, more likely to ___ A) Evolve B) Survive and reproduce C) Change over time D) Be larger B) Survive and reproduce Natural selection acts on ___, and ___ evolve A) Populations, individuals B) Individuals, populations C) Individuals, individuals D) Populations, populations B) Individuals, populations A weed that exhibits resistance to an herbicide ___ A) inherited the gene that made it resistant...

Cnidocyte - ANSWER A specialized cell unique to the phylum Cnidarian; contains a capsule-like organelle housing a coiled thread (nematocyte) that, when discharged explodes outward and functions in prey capture or defense Ectoderm (Cnidarians) - ANSWER The outer most layer of the three primary germ layers in animal embryos; gives rise to the epidermis and in some phyla, the nervous system, inner ear and lens

IB Biology Topic 1: Cell Biology Questions and Answers Already Passed What does cell theory state? That cells are the smallest possible unit of life and that living organisms are made up of cells. What are unicellular organisms? Give two examples Unicellular organisms are organisms with only one cell, such as Paramecium and Chlamydomonas. In unicellular organisms the one cell carries out all of the functions of life. Why are large organisms multicellular? Because of surface area to ...

charophytes - (aquatic) green algae land plants evolved from 3 key traits land plants share with charophytes - 1. rings of cellulose-synthesizing proteins embedded in plasma membrane 2. formation of a phragmoplast (helps form cell wall) 3. structure of flagellated sperm (not all will have this) adaptations enabling plants' move to land: why? - 1. CO2 2. sunlight 3. soil- nutrients 4. fewer predators/pathogens (never been seen before) adaptations enabling plants' move to land: problems...

Steps of embryonic development Correct Answer-1) Zygote (fertilized egg) undergoes early cleavages -> morula (group of equivalent, undistinguishable cells) 2) As morula grows, cell acquires specific characteristics & some morphological differences (ex. embryonic axes) -> blastula (characterized by presence of hollow cavity, blastocele) 3) Gastrulation (gastrula) originates 3 definitive germ layers (ectoderm, mesoderm, endoderm) 4) Once scaffold & primordial for tissues & organs laid out...