pre test which I failed whats the real answers" biology"?

M

mom at 21

New member
I will have to take this test again next week but the trick is I dont know what I got wrong????

1. Which phrase below best completes the following statement concerning the biological species concept? "Two organisms are of the same species if they _____." (Points: 5)
can successfully interbreed, produce reproducing offspring, and do so under natural conditions
can successfully interbreed and produce reproducing offspring
can successfully interbreed
are clones


2. Natural selection favors those members of a population that are _____. (Points: 5)
physically the strongest members of the population
larger than others in the population
best adapted to the current conditions in an ecosystem
most specialized in their requirements


3. Which of the following is the correct taxonomic specification for human beings? (Points: 5)
Homo Sapiens
Homo sapiens
homo sapiens
homo Sapiens


4. The DNA of prokaryotes is _____. (Points: 5)
enclosed in a nucleus
a single, circular chromosome
located in the mitochondria
enveloped in the chloroplast


5. Viruses are non-living particles made up of _____. (Points: 5)
carbohydrates and lipids
cellulose and pectin
protein and glycogen
protein and nucleic acid


6. Fungi _____. (Points: 5)
make organic matter by photosynthesis
digest food externally and then absorb the nutrients
are motile in at least one stage of life
lack cell walls


7. Features which appear in all members of Phylum Chordata in some phase of the life cycle include all of the following EXCEPT FOR: (Points: 5)
a tail
vertebrae
pharyngeal pouches
dorsal nerve cord


8. A fruit is _____. (Points: 5)
a seed
an embryo sporophyte
a cotyledon
a mature ovary, with or without floral parts that have been incorporated into it


9. Which of the following acts to increase the surface area of a root for absorption of water and minerals? (Points: 5)
root hairs
the endodermis
root nodule bacteria
lenticels


10. Water is carried throughout the plant in which tissue? (Points: 5)
cortex
xylem
cambium
phloem


11. Which of the following traits is not characteristic of arthropods? (Points: 5)
segmentation
jointed appendages
cephalization
radial symmetry


12. Gametes are produced in the ______ of human males and in the _____ of human females. (Points: 5)
vas deferens; oviducts
testes; ovaries
prostate gland; ovaries
testes; uterus


13. _____ tissue has closely linked cells and one free surface. (Points: 5)
Epithelial
Muscle
Connective
Nervous


14. What is the major function of capillaries? (Points: 5)
transport and maintenance of blood volume
transport and maintenance of blood pressure
production of blood cell elements
diffusion and distribution of blood-borne materials to deeper tissues


15. Which part of the brain maintains homeostasis of the body by interacting with the endocrine system by way of the pituitary gland? (Points: 5)
cerebrum
hypothalamus
cerebellum
medulla oblongata


16. Which of the following causes the greatest loss to biodiversity. (Points: 5)
disease
overexploitation
habitat loss
pollution


17. Which of the following conditions are most important in determining the specific biome which develops in a region? (Points: 5)
topography and temperature
precipitation and temperature
latitude and precipitation
temperature and latitude


18. _____ populations consist of organisms which use sunlight for energy and carbon dioxide as a carbon source. (Points: 5)
photoheterotroph
photoautotroph
chemoheterotroph
chemoautotroph


19. _____ is a relationship between two species of organisms in which both benefit from the association. (Points: 5)
Parasitism
Mutualism
Commensalism
Predation


20. The maximum number of organisms in a population of an ecosystem that can be supported is called its _____. (Points: 5)
saturation level
J-curve
carrying capacity
climax community
 
1)can successfully interbreed and produce reproducing offspring.

2)best adapted to curent conditions in an ecosystem

3)Homo sapiens

4)a single,circular chromosome

5)protein and nucleic acid

6)digest food externally and then absorb the nutrients

7)vertebrae(bcoz it is the charecteristic of only one sub phyla of chordata ie sub phylum vertebrata)

8)a mature ovary

9)root hairs

10)xylem

11)radial symmetry (charecteristic of phyllum echinodermata)

12)testes,ovaries

13)epithilial (outermost layer so definately one surface will be exposed )

14)diffussion and distribution....

15)hypothalamus

16)habitat loss

17)topography and temp..

18)photoautotroph

19)mutualism

20)carrying capacity
 
1. Which phrase below best completes the following statement concerning the biological species concept? "Two organisms are of the same species if they _____." (Points: 5)
can successfully interbreed, produce reproducing offspring, and do so under natural conditions


2. Natural selection favors those members of a population that are _____. (Points: 5)
best adapted to the current conditions in an ecosystem



3. Which of the following is the correct taxonomic specification for human beings? (Points: 5)
Homo sapiens


4. The DNA of prokaryotes is _____. (Points: 5)
a single, circular chromosome


5. Viruses are non-living particles made up of _____. (Points: 5)
protein and nucleic acid


6. Fungi _____. (Points: 5)
digest food externally and then absorb the nutrients




7. Features which appear in all members of Phylum Chordata in some phase of the life cycle include all of the following EXCEPT FOR: (Points: 5)
a tail
vertebrae
pharyngeal pouches
dorsal nerve cord


8. A fruit is _____. (Points: 5)
a mature ovary, with or without floral parts that have been incorporated into it


9. Which of the following acts to increase the surface area of a root for absorption of water and minerals? (Points: 5)
root hairs



10. Water is carried throughout the plant in which tissue? (Points: 5)
phloem


11. Which of the following traits is not characteristic of arthropods? (Points: 5)
segmentation
jointed appendages
cephalization
radial symmetry


12. Gametes are produced in the ______ of human males and in the _____ of human females. (Points: 5)
testes; ovaries



13. _____ tissue has closely linked cells and one free surface. (Points: 5)
Epithelial
Muscle
Connective
Nervous


14. What is the major function of capillaries? (Points: 5)
diffusion and distribution of blood-borne materials to deeper tissues


15. Which part of the brain maintains homeostasis of the body by interacting with the endocrine system by way of the pituitary gland? (Points: 5)
hypothalamus



16. Which of the following causes the greatest loss to biodiversity. (Points: 5)
habitat loss



17. Which of the following conditions are most important in determining the specific biome which develops in a region? (Points: 5)
topography and temperature
precipitation and temperature



18. _____ populations consist of organisms which use sunlight for energy and carbon dioxide as a carbon source. (Points: 5)
photoautotroph



19. _____ is a relationship between two species of organisms in which both benefit from the association. (Points: 5)
Mutualism



20. The maximum number of organisms in a population of an ecosystem that can be supported is called its _____. (Points: 5)
carrying capacity
 
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