4,064 Answered Questions for the topic biology

Biology Science Botany

08/16/21

What are the two main purposes that the food is used for?
Some autotrophs produce their own food through photosynthesis. What are the two main purposes that the food is used for?
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08/14/21

What is +/- 2 SEM? How would I calculate that? The standard error is 2.786, the standard deviation is 6.229, and the mean is 42.6.
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08/11/21

How to make a fibrin hydrogel?
I am wanting to make a scaffold out fibrin hydrogel. I tried looking online for protocols but have been unsuccessful.Thanks in advance!
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Biology

08/09/21

The Hot Zone by Richard Preston
The author describes the Ebola Virus as being neither dead nor alive. Provide evidenceto support and explain both sides of the argument, and then further explain the author’spossible purpose for... more
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Biology

08/06/21

Which statement best explains why skin cells will never become nerve cells?
a. each type of cell gets a different message from the central DNA which is sorted in DNA cellsb. both types of cells have the same DNA but each cell uses only one part of the DNA messagec. each... more
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Biology

08/06/21

Which of the following statements is NOT a part of the cell theory?
A. stem cells are undifferentiated cellsB. all living things are made of cellsC. the cell is the most basic unit of lifeD. all cells come from other living cells
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Biology

08/05/21

Is a cell with 4 salt molecules outside and 2 salt molecules inside hypertonic, isotonic, or hypotonic?
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Biology

08/05/21

Bacteria are a very broad and diverse group, both with regards to metabolism and shape, as well as where they are found.
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07/28/21

Step by step procedure on how to determine the value of n.
The following solutions are needed to be prepared for the titration procedure:1.) 20 mL of 2 M HCl2.) 20 mL of 0.05 M KOHAfter the approval of the procedure, you went through the titration process... more
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Biology Science Organisms

07/26/21

Using a T-chart to compare the chemical equations, structural similarities and differences between mitochondrion and chloroplast.
What would this look like? Having trouble understanding question and response.
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07/26/21

Correct the underlined word to make the statement true (study sheet)
Correct the underlined phrase to make the statement true.21. Vacuoles absorb light energy surrounding the cell and convert this to energy for the plant. 22. Mitonchondrion is the smallest organelle... more
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Biology Science Science

07/26/21

The cell theory states that all of the following are true, except
The cell theory states that all of the following are true, excepta. All living things are made up of one or more cells and their products. b. The cell is the simplest unit that can carry out all... more
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Biology Science

07/26/21

Plant and animal cells all need all of the following things, except, Cells undergo division for all of the following reasons, except
Plant and animal cells all need all of the following things, except a. a source of energy and nutrients b. water c. sunlight d. gasCells undergo division for all of the following reasons,... more
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07/26/21

How to calculate the molar concentration of the given:
The reaction of 𝐾𝑂𝐻 with 𝐻𝑁𝑂3 is presented by the unbalanced chemical reactionbelow:___ KOH (aq) + ___ HNO3 (aq) ---> ___ KNO3 (aq) + ___ H2O(l)Calculate the molar concentration of Nitric acid... more
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07/26/21

Calculate the weight percent %(w/w).
The amount of oxalic acid (𝐻2𝐶2𝑂4) in a sample of rhubarb was determined byreacting with 𝐹𝑒3+. After extracting a 10.62 g of rhubarb with a solvent, oxidation of the oxalic acid required 36.44 mL... more
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07/26/21

Which statistical analysis do I do here?

Hi there, I have 1 old drug and 4 new drugs and They all have the ability of inducing hormone X in patients. I need help in: how to calculate how well the old and new drugs induce hormone X in... more
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07/25/21

Macromolecules food combinations
So I have this home experiment since we're in a pandemic and schools are still home based learning, I have to make something edible with combinations of macromoleculesCarbohydrates+water,... more
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Biology

07/24/21

Determine if Darwin's theory of natural selection supports or conflicts with each statement below.
Determine if Darwin's theory of natural selection supports or conflicts with each statement below.CategoryEvolutionary theory supports this statement.CategoryEvolutionary theory conflicts with this... more
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Biology

07/24/21

rganisms with _____ will be more likely to survive and reproduce when their environment presents challenges.
rganisms with _____ will be more likely to survive and reproduce when their environment presents challenges.existing beneficial mutationsthe ability to adapt their genotypethe ability to produce... more
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Biology

07/24/21

Select examples that might be evidence of sexual selection.

281 pointSelect examples that might be evidence of sexual selection. (Select all that apply.)A.Hatching turtles scrambling to the seaB.Camouflaged insectC.Two male deer battling with their... more
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Biology

07/24/21

What are elements involved in the process of evolution by natural selection? Choose all that fit.
What are elements involved in the process of evolution by natural selection? Choose all that fit.A.genetic variation in a populationB. production of more offspring than can surviveC. individual... more
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07/24/21

HELP! Which statistical test can I use!

I have 6 studies, 3 studies on a old drug treatment that increases hormone “A” in patients with a specific disease to help relieve their symptoms, and 3 studies on three different new drugs that... more
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Biology Zoology

07/22/21

What evolutionary modifications in design have most marine gastropods undergone? What did these modifications address?
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07/21/21

What statistical test can I use?

I want to measure the increase of Fetal haemoglobin in patients in a few case studies before and after they use a specific drug. I am taking data from 5 studies, what test can I use and how can I... more
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07/20/21

Biochemistry Question

If 2 mL of 0.5 M NaOH is added to 50 mL of 0.1 M sodium phosphate buffer at pH 7.0, what is the resulting pH? If 5 mL of 0.1 M HCl is added to 50 mL of 0.1 M sodium phosphate buffer at pH 7.0,... more
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