characters of echinoderms

Please help. This is NOT for an assignment. It is to study for an exam. Want to make sure I am on the right track. Thank you. (2 marks) 6. List two characters of echinoderms that they do not share with other animal phyla. (6 marks) 7. Explain the multiregional hypothesis for the origin of huma...

Aoicomplexans Evolved Through Stages of Endosymbiosis

This is not for an assignment. It is to study for an exam and I need help to make sure I am on the right track. Thank you. (7 marks) 2. Explain how apicomplexans seem to have evolved through various stages of endosymbiosis. (5 marks) 3. What are the similarities and differences between a moss ...

Animal Phyla and Segmentation

Name four animal phyla with segmentation. Name and briefly explain four characters of insects that they don't share with other arthropods. Explain the top down and bottom up hypothesis of bird flight. How do Neanderthals differ from modern humans? What arguments favour Neanderthals being a distin...

The Heart Role in the Body

Consider the heart, an organ with a variety of tissues. In what way is the heart more than the sum of the tissues it comprises?

DNA Mutation and Alignment

Could you please help me to understand the following DNA alignment problem. Thank you. Three strands of DNA have been obtained from three different species that are fairly closely related. Using the first strand as your reference strand, try to figure out where the sequences of the other strands h...

Dinosaurs and Birds do Interbreed

A new species has been discovered. The animal is a vertebrate, approximately 18-24 inches in length. Members of this species are covered in scales and are known to lay shelled eggs. Dissection has also shown that this animal possesses a four-chambered heart. Its skeleton is shown below, but the sku...

Using an Article to Trace the Scientific Method

Researchers recently investigated (see summary in http://www.sciencedaily.com/releases/2010/06/100609111316.htm) in laboratory mice whether or not coffee prevented the development of high blood sugar (hyperglycemia). The mice used in this experiment have a mutation that makes them become diabetic. ...

Goat Milk versus Cow Milk

Some sources of information state that specific nutrients can be found in higher concentrations in goat's milk than in cow's milk. Please look for some information countering the goat milk side and also a detailed nutrient breakdown of cow's milk versus goat's milk, making the real differences obvio...

Discussion on sexual and asexual reproduction

Some organisms reproduce sexually while others reproduce asexually. Define both types of reproduction. What are the advantages and disadvantages of reproducing each way? Name two organisms that reproduce sexually and two that reproduce asexually.

Does sky blue paint keep wasps from building nests?

Your neighbor added a farmer's porch to his house and painted the ceiling of it blue. When you asked him why, he told you he had read that the sky blue ceiling would fool wasps into thinking it was the sky and they would not build any nests under the eaves of the porch or along the ceiling. Would a...

Biological Species Concept

Discuss the concept of species. What ways do modern taxonomists use to distinguish different species?

Four Characteristics of Living Organisms

Please help me study by answering this question: Relate the various levels of organization in living organisms to those of nonliving entities. Use specific examples to explain your answer.

Environmental conditions of Sea cucumbers

Sea cucumbers will _____ when environmental conditions deteriorate. a. eject their digestive tract, respiratory structures, and gonads b. crawl to an area with more favorable conditions c. form a resistant spore d. float to the surface and then later drop to a more favorable location e. ...

Characterize open systems

An organism can exchange matter and energy with its surroundings. Thus, any change in an organism's energy content must be balanced by a corresponding change in the energy content of the surroundings. As such, an organism is referred to as: a. a closed system b. an open system c. a dynamic...

Nine Major Animal Phyla

Please use Citations and Cite References There are nine major animal phyla (actually there are over thirty that are recognized by taxonomists so consider yourself getting off lucky). Choose two phyla that you find particularly interesting (while trying avoid combinations picked by other class mem...

Question about the domains of living things.

Describe the characteristics of the various domains of living things. Do you notice any similarities or differences between the domains' characteristics? What are some of the similarities or differences you notice?

Animal tissues types and homeostasis

1. The four basic animal tissues are a. connective, digestive, nervous, and respiratory. b. blood, bone, connective, and epithelial. c. epithelial, connective, muscle, and nervous. d. digestive, nervous, reproductive, and respiratory. e. circulatory, excretory, respiratory, and sensory. 2....

Animal Behavior: Group Selection

This is an overview of group selection and a specific type of behavior involved, kin selection. This explains what kin selection is and gives a couple of examples of organisms that practice this type of behavior. Included are leading questions that would help you to give a complete explanation of ...

Animal Classifications

Animals are placed in taxonomic classifications based on differences and similarities of their traits. If you know what critical traits to look for, it is possible to separate any animal into a taxonomic category. The common categories are Domain, Kingdom, Phylum, Class, Order, Family, Genus and ...

Charles Darwin and his work

Besides his book On the Origin of Species, Charles Darwin wrote many other significant works. Provide the names of three additional significant books or articles that were written by Darwin and provide a description of the subject matter and significant contribution of each of these. Please pro...

Anaphylactic Shock

I first need to describe what Anaphylactic shock is, then describe how this will affect cardiac output and blood pressure and why. Then I would need to know the compensation mechanisms that the body will use to restore the cardiovascular system back to normal in detail. I really don't know w...

Animals are placed in taxonomic classifications based on differences and similarities of their traits. If you know what critical traits to look for, it is possible to separate any animal into a taxonomic category.

Could you please help me with this? Examples of nine Animal Phylum: Porifera, Cnidaria, Nematoda, Arthropoda, Platyhelminthes, Annelida, Mollusca, Echinodermata, and Chordata. jellyfish, snail, earthworm, fly, spong, starfish, snake, flatworm, roundworm 1.Which group(s) lack tissue level o...