Crabs - Study guides, Class notes & Summaries

Part A A marine biologist dredges up a small animal from the bottom of the ocean. It is uniformly segmented, with short, stiff appendages and soft, flexible skin. It has a complete digestive system and a closed circulatory system, plus multiple true coeloms. Based on this, you determine that the animal must be a(n) _____. - annelid Correct: The description matches the characteristics of annelids. Part A Members of the phylum Mollusca _____. - are soft-bodied and often covered by a shell ...

D correct answers Which slang term is a reference to public lice? a. "scabs" b. "the clap" c. "cankers" d. "crabs" D correct answers Typically, STIs are spread via ____. a. casual contact b. expectoration c. needles d. body fluids D correct answers Within ____ of having sex for the first time, half of teenage girls may acquire an STI a. two weeks b. three months c. six months d. two year C correct answers From the perspective of sexual activity, making ou...

___ are commercially harvested in South America for their skins. correct answers Tegus ___ are most often traded for meat in southeast Asia. correct answers Freshwater Turtles ___ are primitive salamanders that have external gills, and front legs but no hind legs correct answers sirens ___ are ratite birds that still exist today in New Zealand. correct answers Kiwis ___ are structures produced by male salamanders for reproductive purposes correct answers spermatophores ___ are the...

BIOS 1705: Lab Quiz 1 with Verified Solutions - **What part of the microscope moves the slide around the stage?** - Stage adjustment knobs - **Which lens is closest to the eye when using a microscope?** - Ocular - **What knob should you use to focus at low power only?** - Coarse adjustment knob - **What does the condenser do in a microscope?** - Concentrates the light on the specimen - **If you have a high power objective lens with a magnification of 40x, what would be the ...

1. Phylum Porifera - Answer-- sponges - loosely organized and lack tissues - multicellular with several types of cells - 8,000 species, mostly marine - no apparent symmetry - adults sessile, larvae free-swimming - water drawn through pores into spongocoel - flows out through osculum - choanocytes line spongocoel - mesohyl between choanocytes and epithelial cells - reproduce sexually and asexually 10. Phylum Nematoda - Answer-- roundwomrs - in nearly all habitats - over 20,000 specie...

1. Fats contribute how many calories to a food per gram? A. 4.5 B. 4 C. 6 D. 9 EXPLANATION ANSWER: D - Fats contribute nine calories to a food per gram. For this reason, it is important to limit the amount of fat in a dish. The less fat in a dish the lower the total calories of the dish. 2. The enzyme found in a cows stomach used in cheese making is called: A. Rennin B. Acidophiles C. Lactic Acid D. Gastrojuice EXPLANATION ANSWER: A - Rennin is the enzyme found in a cows sto...

Animals, including ticks, spiders, mites and other insects as well as crustaceans such as shrimp, lobster and crabs arthropods Describe an arthropod that transports a disease-causing organism, or pathogen, from one host to another. vector Toxin produced by some animals, such as scorpions, spiders and snakes. venom The injection of poisonous materials by bites or stings of arthropods or snakes envenomation What is passive transmission or mechanical transmission -arthropod carries pathogen fro...

The manager of a city recreation center wants to estimate the percent of city residents who favor a proposal to build a new dog park. To gather data, the manager will select a random sample of city residents. Which of the following is the most appropriate interval for the manager to use for such an estimate? A one sample z-interval for a population proportion Biologists studying horseshoe crabs want to estimate the percent of crabs in a certain area that are longer than 35 centimeters. Th...

trilobites, horseshoe crabs - Answer what are the first 2 distant ancestors to insects? 400-600 million years - Answer how old are trilobites? 350 million years - Answer how old are horseshoe crabs? tiny, wingless, soft bodied - Answer What are the first insect fossils? 380 million years - Answer how old are the first insect fossils? 180 million years ago - Answer when were the most modern insect relatives present? cave drawings, china silkworms, egypt honeybe...

passive (simple) diffusion - ANSWER -from high to low concentration of solute -no energy required -no membrane protein required if cell is placed in surrounding solution with higher solute concentration then inside the cell, the solution is ____ relative to the cell - ANSWER hypertonic If cell is placed in surrounding solution with lower solute concentration than inside cell, the solution is _____ relative to the cell - ANSWER hypotonic concentrations same inside and outside - ANSWER ...