1. REGENTS REVIEW LOCK-IN

2. Q: Hereditary information is stored inside the
(1) ribosomes, which have chromosomes that contain many genes
(2) ribosomes, which have genes that contain many chromosomes
(3) nucleus, which has chromosomes that contain many genes
(4) nucleus, which has genes that contain many chromosomes

3. Q: Which process can produce new inheritable characteristics within a multicellular species?
(1) cloning of the zygote
(2) mitosis in muscle cells
(3) gene alterations in gametes
(4) differentiation in nerve cells

4. Q: Offspring that result from meiosis and fertilization each have
(1) twice as many chromosomes as their parents
(2) one-half as many chromosomes as their parents
(3) gene combinations different from those of either parent
(4) gene combinations identical to those of each parent

5. Q: When habitats are destroyed, there are usually fewer niches for animals and plants. This action would most likely not lead to a change in the amount of
(1) biodiversity
(2) competition
(3) interaction between species
(4) solar radiation reaching the area

6. Q: What impact do the amounts of available energy, water, and oxygen have on an ecosystem?
(1) They act as limiting factors.
(2) They are used as nutrients.
(3) They recycle the residue of dead organisms.
(4) They control environmental temperature.

7. Q: A science researcher is reviewing another scientist’s experiment and conclusion. The reviewer would most likely consider the experiment invalid if
(1) the sample size produced a great deal of data
(2) other individuals are able to duplicate the results
(3) it contains conclusions not explained by the evidence given
(4) the hypothesis was not supported by the data obtained

8. Q: Nerve cells are essential to an animal because they directly provide
(1) communication between cells
(2) transport of nutrients to various organs
(3) regulation of reproductive rates within other cells
(4) an exchange of gases within the body

9. Q: A sudden change in the DNA of a chromosome can usually be passed on to future generations if the change occurs in
(1) a skin cell
(2) a sex cell
(3) a liver cell
(4) a brain cell

10. Q: Many vaccinations stimulate the immune system by exposing it to
(1) antibodies
(2) mutated genes
(3) enzymes
(4) weakened microbes

11. Q: During meiosis, crossing-over (gene exchange between chromosomes) may occur. Crossing over usually results in
(1) overproduction of gametes
(2) fertilization and development
(3) the formation of identical offspring
(4) variation within the species

12. Q: The reproductive system of the human male produces gametes and
(1) transfers gametes to the female for internal fertilization
(2) produces enzymes that prevent fertilization
(3) releases hormones involved in external fertilization
(4) provides an area for fertilization

13. “Natural ecosystems provide an array of basic processes that affect humans.”
Q: Which statement does not support this quotation?
(1) Bacteria of decay help recycle materials.
(2) Trees add to the amount of atmospheric oxygen.
(3) Treated sewage is less damaging to the environment than untreated sewage.
(4) Lichens and mosses living on rocks help to break the rocks down, forming soil.

14. Q: The carrying capacity of a given environment is least dependent upon
(1) recycling of materials
(2) the available energy
(3) the availability of food and water
(4) daily temperature fluctuations

15. Q: The pancreas produces one hormone that lowers blood sugar level and another that increases blood sugar level. The interaction of these two hormones most directly helps humans
(1) maintain a balanced internal environment
(2) digest needed substances for other body organs
(3) dispose of wastes formed in other body organs
(4) increase the rate of cellular communication

16. Q: The structure that makes nutrients most directly available to a human embryo is the
(1) gamete
(2) stomach
(3) ovary
(4) placenta

17. Q: Areas with many different niches will most likely have
(1) large numbers of organisms that will become extinct
(2) no organisms that will become extinct
(3) little diversity among the organisms
(4) great diversity among the organisms

18. Q: Imported animal species often disrupt an ecosystem because in their new environment, they will most likely
(1) eliminate the genetic variation of the autotrophs
(2) increase the number of mutations in the herbivores
(3) have no natural enemies
(4) be unable to produce offspring

19. Q: The analysis of data gathered during a particular experiment is necessary in order to
(1) formulate a hypothesis for that experiment
(2) develop a research plan for that experiment
(3) design a control for that experiment
(4) draw a valid conclusion for that experiment

20. Q: The genetic code of a DNA molecule is determined by a specific sequence of
(1) ATP molecules
(2) chemical bonds
(3) sugar molecules
(4) molecular bases

21. Q: Which phrase does not describe cells cloned from a carrot?
(1) they are genetically identical
(2) they are produced sexually
(3) they have the same DNA codes
(4) they have identical chromosomes

22. **FINAL ROUND**
Thirty grams of hay (dried grasses) were boiled in 500 milliliters of water, placed in a culture dish, and allowed to stand. The next day, a small sample of pond water was added to the mixture of boiled hay and water. The dish was then covered and its contents observed regularly. Bacteria fed on the nutrients from the boiled hay. As the populations of bacteria increased rapidly, the clear mixture soon became cloudy. One week later, microscopic examination of samples from the culture showed various types of protozoa (single-celled organisms) eating the bacteria.
DRAW A 3 TIERED ENERGY PYRAMID BASED ON THE ABOVE SCENARIO.

24. REMEMBER…
BEST OF LUCK ON THE REGENTS EXAM!!!!! TO BE GIVEN ON TUESDAY 8:00-11:00, BE THERE NO LATER THAN 7:45.