BIOLOGY HIGH SCHOOL

Which of the following types of algae would have rigid cell walls composed of silica?a. paramecium
b. euglena
c. diatoms
d. spyrogyra

Answers

Answer 1
Answer: c. It is among the most known form of phytoplankton and are usually unicellular!
You can find them arranging themselves in shapes by making colonies.

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In the semi arid regions of China, the country's inhabitants have practiced water harvesting for generations. Water harvesting is the process of collecting rainfall and/or runoff for later use. How does this water conservation method help the environment?
What's the layer of material found at the innermost part of wood?A. SapwoodB. Cork cambiumC. Vascular cambiumD. Heartwood
In plants that have alternation of generations the haploid spores are made by theA. cotyledon. B. seed coat. C. sporophyte. D. gametophyte.
All of the chemical reactions within an organism is known as_____.
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Which of the following could result in secondary succession?a. the formation of a tall sand dune on a previously grassy beach
b. a vast glacier in motion forming a U-shaped valley on its wake
c. a volcanic eruption that covers most of what used to be a forest
d. an introduced species that devastates native plants as it feeds

Answers

Actually the correct answer is D.

D. An introduced species that devastates native plants as it feeds

is the correct answer.

Hope I helped!

Which suture is found between the parietal bones? A. Lambdoidal. B. Parietal. C. Sagittal. D. Squamous. E. None.

Answers

Answer:

Sagittal suture.

Explanation:

The sagittal suture is a dense, immovable joint that runs along the midline of the skull, separating the two parietal bones. It connects the frontal bone at the top of the skull to the occipital bone at the back.

Which of these elements has the lowest standard reduction potential?A. chlorine

B. iron

C. lithium

D. zinc

Answers

Standard reduction potential is the likelihood that a species will be reduced. It is written in the form of a reduction half reaction.
Lithium  has the lowest standard reduction potential.

Answer: C. lithium

Explanation:

Standard reduction potential is the tendency for an element to gain electrons or get reduced ,measured at standard conditions i.e. when concentration is 1 M and temperature is 298 K.

It is given by: E^0_(M^+/M)

E^0_([Cl^(2)/2Cl^-])=+1.36V

E^0_([Fe^(2+)/Fe])=-0.41V

E^0_([Li^(+)/Li])=-3.04V

E^0_([Zn^(2+)/Zn])=-0.76V

Thus lithium has the lowest tendency to accept electrons and thus has lowest standard reduction potential.

Even if you live in the middle of North America, the quality of your watershed can affect the quality of the ocean. How can this be? Select one: a. Evaporation carries materials from your watershed to the ocean. Incorrect b. Materials in your watershed are eventually transported to an ocean. c. The amount of water in your watershed will affect ocean evaporation. d. Materials in your watershed are not transported to an ocean.

Answers

The appropriate answer is b. Materials in your watershed are eventually trasported to an ocean. A watershed is the land area in which surface runoff enters into a river or river system. All rivers flow from a high elevation (upper course) to a low elevation (lower course). In most cases the lowest point where a river will flow to is the sea. As rivers flow they transport and deposit material along the course and eventually in the sea.

After the food has been chewed and lubricated, it is pushed by the tongue into the _______.

Answers

After food has been chewed and lubricated, the tongue the pushes it into the pharynx, also known as the throat. From there it travels into the esophagus. Once in the esophagus, the muscles work to push it down in the stomach. The mouth is the first stop in the complete digestion process.
It is pushed into the esophagus. 

What plant cell organelle helps maintain the shape of the cell by helping to maintain turgor pressure?

Answers

The vacuole helps the plant cell to maintain the shape of the cell by helping to maintain turbot pressure.
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Which of the following statement is true of a semi-conservative model of replication?1) Each newly synthesized double helix of DNA contains one new strand and one old strand. 2)DNA synthesis involves conserving only part of each of the original strands in a DNA molecule. 3)The original DNA molecule is stored in the cell nucleus and serves as a template for creating copies containing two new strands. 4)DNA synthesis involves conserving one strand of a double helix of DNA and discarding the other.