The distinguishing characteristics of the vertebrae composing the vertebral column are noted below. Correctly identify each described structure by choosing a response from the key. Key: a. b. c. atlas axis cervical vertebra—typical 1. 2. 3.
It is located in the central disc, the area to which the arms are attached. 3. Turn over the sea star so that the ventral side is side up. Observe the ambulacral grooves that run the length of each ray. Locate the tube feet covering the grooves.
Some of the organisms such as Tesseropora Roseas (Barnacles) and Knobbly Winks have different adaptations, which allow them to survive in these harsh conditions. Competition with other organisms, availability of food and predation can also affect the abundance and distribution of rock-shelf organisms. To determine the abundance and distribution of these rock-shelf organisms a quadrat with an area of 0.5m2 was used. It was placed randomly in each location. Location 1 was above the high tide mark, Location 2 the tidal rock pools and location 3 the low tide mark.
They are s-shaped, long, slender bones that lie horizontally across the anterior part of the thorax superior to the first rib. C. Which surface markings could Stefan use to distinguish the right humerus from the left? Stefan could find the coronoid fossa which would indicate that if it is the right or left due to it only being on the anterior side of the bone. Also by recognizing their landmarks such as the head, deltoid tuberosity, and the olecranon fossa D. Why would Stefan think that an enlarged right deltoid tuberosity might indicate right-handedness? The deltoid tuberosity serves as an attachment for the tendons of the deltoid muscle, when you use one arm and hand much more than the other the bone will make that attachment site stronger to ensure adequate use and reduce the risk of harming that tendon, bone, or muscle E. What is the location of the pubic symphysis Stefan refers to in the story?
Limestone formed after and on top of the older rocks.” (Archaeological Museum Aruba, 3) While limestone is very common rock on Aruba, a white and black speckled plutonic rock called quartzdiorite is also another prevalent part of the landscape. (Archaeological Museum
A prominent ridge called the spine runs diagonally across the posterior surface of the scapula. Hassan could have identified which were right and left, possibly by the medial border because the thick edge (lateral border) is closer to the arm. The glenoid cavity is the shallow depression that articulates with the head of the humerus. B. Which bone is Stefan referring to as the collarbone?
The uplift was surrounded by an epicontinental sea where sediment accumulated in marine margins creating sandstones, siltstones and limestones throughout the Basin. Facies 1 in the carbonate unit consists of 4-34 cm beds of black micrite, matrix supported with less than 5-10% grains making it a mudstone; crystalized shell fragments are present, 2-4 mm bivalve bioclasts and sparse 3-5 cm rugose coral and crinoid fragments; horizontal inclined burrows are
Some of our important human characteristics, such as a spinal cord encased in a bony vertebral column, and the concentration of nerve cells in a brain, are part of our vertebrate heritage, established in a common ancestor over 600 million years ago. From our mammalian heritage, established over 70 million years ago (though some of these common traits may go back over 200 million years), humans developed internal mechanisms for maintaining a constant body temperature (warm-bloodedness), hair, and a generalized dental pattern that allows a more varied diet than is found among other vertebrates. The reproductive pattern of mammals is an especially distinguishing trait: They usually give birth to live offspring (versus laying eggs), nurse their young with milk produced in the female’s mammary glands, and have complex social mechanisms for the care of the very young. All living organisms must cope with the problem of how to survive and reproduce within their environments. Adaptation refers to the relationship between an organism and its environment: When we say that a population is adapted to its environment, we mean it has achieved and maintained a relationship to that environment in which it can survive and reproduce
How many half-lives have passed since the crystal formed? A) 1 B) more than 1 but less than 2 C) more than 2 but less than 3 D) more than 3 Answer: B 4) Which of the following geologic observations would NOT bear directly on working out the sequence of geologic events in an area? A) inclusions of sandstone in a granite pluton B) a well-exposed dike of basalt in sandstone C) an unconformity between a granite and sandstone D) the feldspar and quartz contents of a granite Answer: D 5) The principle of ________ is the concept that ancient life forms evolved in a definite order and therefore their fossils can help determine the geologic ages of strata. A) superposition B) cross-cutting relationships C) fossil succession D) fossil assemblage Answer: C 6) Which of the following is an essential characteristic of an index fossil? A) The organism lived in a very specific environment or two, such as tropical volcanic islands.
Eighteen inches is a big length, about half a meter, and the shell’s size makes it seem more paramount. Something that is embossed is of high importance, like the conch, embossment shows credibility. The adjective “glistening” is used to describe the conch, glistening is defined as having a sparkle or gleam. Something that is sparkling is beautiful. The conch is also compared to a tusk; a tusk is large, and strong.