1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Llana [10]
3 years ago
8

Your biology teacher has asked you to do the impossible! You must measure the diameter of one algal cell. You are about to turn

in a blank lab report when your friend Mel comes along and says it is an easy task. First he shows you how to compute the diameter of your field of view. At 40X, your field of view is .50 mm or 500 um. If you look carefully you count 15 algal cells spanning the field of view.
The diameter of one algal cell is approximately

A) 0.03um
B)1.50um
C)3.00um
D)33.3um
Biology
2 answers:
Tresset [83]3 years ago
7 0
C.
It is d, becuase you divide 500 by 15, and that is the closest answer
fiasKO [112]3 years ago
7 0

the correct answer is D

You might be interested in
Choose ALL that apply: Changes the APPARENT WAVELENGTH of the light. 1 point
Nataly_w [17]

Answer:

The correct answer is "Red shift"

Explanation:

Blue shift: When the source and observer approach one another, the evident frequency increments or apparent wavelength diminishes. Here the Doppler shift is positive. This is known as blue shift.

Red shift: When the source and observer move away from one another, the clear frequency diminishes or apparent wavelength increments. Here the Doppler shift is negative. This is known as red shift.

8 0
3 years ago
What happens when light energy excites electrons in photosystem II?
Vlada [557]

Answer:

C. Electrons are released into the electron transport system.

Explanation:

Photosynthesis has both light dependent processes and light-independent processes. In the light-dependent reactions, photosystem II is the first protein complex. Photosystem II is present in the thylakoid membrane of plants.

<em>When the photons or light energy hits photosystem II, the free electron excites and released into the electron transport system (series of proteins). </em>The electron then passes through electron transport system and the energy from the electron fuels the hydrogen ions to move against their concentration gradient. Once the energy is utilized, the electron is accepted by photosystem I.

Hence, the correct option is C.

4 0
3 years ago
Read 2 more answers
One of the questions early geneticists had to answer was how only four nucleotides can specify placement of 20 amino acids in pr
jenyasd209 [6]

Answer:

<h2>Codon </h2>

Explanation:

The sequence of DNA is transcribed into mRNA, containing the sequence  for protein synthesis, protein is synthesized according to the codons in mRNA.  This sequence of nucleotide on DNA/ RNA is divided into a series of three nucleotide units, and one unit of three nucleotide is  known as codons.

There are overall 64 codons, 61 codons out of 64 codons, codes for overall 20  amino acids, and the remaining three  are stop codons.

These there codon do not code for any amino acid.

And these 61 codons, they  code for total 20 amino acids. So one amino acid can be coded by one or more than one codons.

6 0
4 years ago
Select TWO events that occur when a neurotransmitter binds and activates an excitatory synapse.
andrew-mc [135]

Answer:

Key points

Neurons communicate with one another at junctions called synapses. At a synapse, one neuron sends a message to a target neuron—another cell.

Most synapses are chemical; these synapses communicate using chemical messengers. Other synapses are electrical; in these synapses, ions flow directly between cells.

At a chemical synapse, an action potential triggers the presynaptic neuron to release neurotransmitters. These molecules bind to receptors on the postsynaptic cell and make it more or less likely to fire an action potential.

Explanation:

7 0
3 years ago
Do predators really kill only the old and sick prey? Please give me a answer
Svetllana [295]
No, They find the alone one because they are easier to catch when away from the tribe. They are easier to kill when they are old and sick, or weak.
4 0
3 years ago
Read 2 more answers
Other questions:
  • The ______ system senses changes in the internal and external environment so that the body can adapt to the changes.
    5·2 answers
  • What is it important that carbon is recycled?
    7·1 answer
  • A caterpillar changing into a butterfly
    13·1 answer
  • Which word is a homophone for scene? <br> a. scenery <br> b. scent <br> C. seen <br> D.sight
    9·2 answers
  • What type of environment is likely to be found on the side of a mountain range opposite the direction of the wind?
    8·2 answers
  • This is a nutritional deficiency resulting from lack of food or from the inability of the body to convert or absorb it.
    8·1 answer
  • Which is true of sex-linked genes?
    13·2 answers
  • SEEEE ATTACHHHHHMEEENNTTTTSS!!!!!
    7·2 answers
  • During gym class, Raul walks briskly for a half hour. Jenna decides to sprint and run the bleachers for the same amount of time.
    15·1 answer
  • In what year did Oxford scientist Robert Brown discover the motion of small particles?
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!