Affiliate Marketing Secrets

A biologist places a single, living sponge in a saltwater tank. After several weeks, the biologist observes other small sponges living in the tank. Because the biologist is certain that no other sponge was introduced into the tank, what other explanation could you provide to explain the observation?
Describe the body of a leech. In what way do the leech’s adaptations make it suited for its niche?
When natural disasters strike natural areas, often the only animals to survive are the insects. Explain why this might happen.
PS, this is not my homework or anything, I need to study for a test i have in class tomorrow. So can someone plz help me? these are the only ones i cant figure out! D:

1. All of the following are reasons why some diseases are becoming serious problems again except:
a. old diseases finding new niches
b. viruses can survive for long periods of time between hosts
c. viruses and bacteria readily mutate
2. Which of the following is a characteristic of all organisms except viruses?
a. genetic information stored as nucleic acid
b. ability to control metabolism
c. ability to reproduce
d. plasma membrane
e. structure includes proteins
3. Which of the following events is necessary for the production of a full blown malignant tumor?
a. activation of an oncogene in the cell
b. the inactivation of tumor suppressor genes in the cell
c. the presences of mutagenic substances within the cells environment
d. the presences of a retrovirus
e. a and b
4. Proteomics presents a particular challenge because
a. the number of proteins in humans probably far exceeds the number of genes
b.a cell’s proteins differ with cell type
c. proteins are extremely varied in structure and chemical properties
d. a and b
e. a,b, and c
5. A difference between prokaryotic and eukaryotic RNA is that:
a. eukaryotic RNA lasts much longer before being degraded
b. prokaryotic RNA never leaves the cell nucleus
6. A sequence of DNA that has inverted sequences on either end is found scattered throughout the chromosome of a bacterium.
a. transformation
b.transposition
c.transduction
d. conjugation
e. mutation
7. Gene therapy:
a. has proven to be beneficial to HIV patients
b. involves replacements of a defective allele in sex cells
c. cannot be used to correct genetic disorders
d. had apparent success in treating disorders involving bone marrow cells
e. is widely accepted
8. Current applications of biotechnology include:
a. cleaning up toxic waste
b. development of artificial photosynthetic machines
c. manufacturing human growth hormone
d. a and c
e. a,b,and c
Thanks

Having some problem Biology question?
1. A student is examining a large, multicellular plant which he believes to represent an entirely new division. The organism produces no pollen or seeds. A cross-section through what appears to be the stem reveals no xylem or phloem tissue. No organs are present. Some specimens have cells that are all haploid; others are composed entirely of diploid cells. The organism cannoth possibly be a(n):
A. Fern D. Vascular plant
B. Alga E. Member of an undiscovered division
C. Moss
2. A child notices two houseflies on the table. One is twice as large as the other. The child asks: “if we feed it plenty of sugars, how long will it take the little fly to grow as big as the big one?”
3.Why are arthropods small?
A. They are the most numerous organisms on the earth.
B. They reproduce rapidly
C. They have exoskeletons
D. Arthropods are a source of food for many other animals
E. They have to fill many ecological niches.
please explain your answer after selecting one of the following. thank you so much

1. Organisms with overlapping niches probably have which type of relationship?
a. commensal
b. competitive
c. mutualistic
d. parasitic
2. Analyze each of the sequences in the primary succession of species colonizing a newly formed volcanic island and select the option in the correct order.
*** is it: bare rock, lichens, small annual plants, perennial herbs and grasses, shade tolerant tree?!
if its not that order…plz give me the right order….thnxx!!
3. How does an enzyme influence a biological reaction?
a. It increases the net energy difference between reactants and products.
b. It decreases the activation energy necessary to initiate the chemical change.
c. It increases the kinetic energy of reactants, thereby increasing their tendency to collide.
d. It decreases the kinetic energy of reactants, enabling them to undergo chemical change more easily.
4. A student set up four test tubes containing starch solution in which to perform starch digestion. Supplies included amylase (enzyme that digests starch) and an incubator. In which tube listed starch digestion proceed most quickly?
a. Tube 1: No amylase, room temperature (25*C)
b. Tube 2: No amylase, body temperature (37*C)
c. Tube 3: Amylase present, room temperature (25*C)
d. Tube 4: Amylase present, body temperature (37*C)
5. What occurs during the process of meiosis in humans that cans lead to a child which the conditions of Down Syndrome?
a. production of a duplicate chromosome set
b. production of gametes which are diploid
c. production of gametes with one duplicate chromosomes
d. production of gametes of gametes with one duplicate sex chromosome.
6. Which of the following is the explanation of why bird wings and reptile forelegs are evidence of evolution?
a. Similar functions point to a common ancestor.
b Analogous structures indicate a common ancestor.
c. Vestigial structures point to a common ancestor.
d. Homologous structures point to a common ancestor.
thnx so much guys…nd plz no comments that does not relate to this ok! <3

i forgot my biology book at school and i need help with these questions. any answer helps, i prefer complete sentence if you are willing, but if not, thanks anyway. so here are the questions.
1 What is ecology?
2 define: species; population; community; ecosystem; biome; biosphere;
Tell how these are related.
3 How is a habitat different from a niche;
4 What are biotic and abiotic factors?
5 What is the Competitive Exclusion Principle?
6 How is the movement of matter AND energy through an ecosystem different?
7 What are autotrophs? Give examples. What are heterotrophs? Give examples.
8 Name two ways autotrophic organisms can make their own food. How are these different?
9 What is a resource? A food chain? A food web? How are these related?
10 What is an herbivore, carnivore, omnivore, detritivore, decomposer,scavenger?
11 How do they get their energy? Be able to give examples of each of these.
12 What is a trophic level? What percentage of energy is passed on from one trophic level to the next?
13 What is a biogeochemical cycle?.
14 How do (water, carbon, nitrogen, phosphorus) atoms enter and leave the atmosphere, land, water, and cycle through the ecosystem?
15 In which cycle does the atmosphere NOT play a role?
16 Which biomolecules are important to living things and which cycles provide the atoms to build these?
17 What is transpiration? Nitrogen fixation? Denitrification? Evaporation? Condensation? Precipitation?
18 Which organisms play a role in these processes?
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~…
19 NAME the 6 levels or organization that ecologists use
20 What are the ways organisms interact in an ecosystem? Define:(Competition, Predation, Symbiosis)
21 Name the 3 kinds of symbiosis? Identify examples of each?
21 What are some things organisms must compete for?
22 What is a limiting factor? How does it affect a population?
23 What is primary productivity? An algal bloom?
24 What happens when an over abundance of a limiting factor becomes available?
25 How do organisms cooperate? What is predation? What is a predator? Prey?
26 What are the 3 kinds of symbiosis? Be able to identify examples of each?
27. Name the two things that can affect the size of a population
28. What is exponential growth? Under what conditions does it occur in a population?
29. What is logistic growth?
30. Give two examples of density-dependent limiting factors? What does this type of limiting factor
rely on?
31. What is the difference between primary and secondary succession?
32. What kind of growth is represented by a S curve (as opposed to a J curve)
33. Explain the difference between a resource that is renewable and nonrenewable.
you do not have to answer all of them (you’d be AWSOME if you did though(: ) but try to answer one that hasnt been answered yet. THANK YOU!(: