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
guajiro [1.7K]
3 years ago
6

Which statement is true about scientific questions?

Biology
1 answer:
Lana71 [14]3 years ago
6 0

Answer: They come from recognized knowledge gaps.

Explanation: A good scientific question, when answered, leads to other good questions.

You might be interested in
Extended Response: Explain in your own words why it is important to conserve water. Then list 3 ways in which you can conserve w
Bezzdna [24]
There are many reasons why we should conserve water. To start water is used on trees which gives use air. Also water is needed by all human beings, it also helps us to stay hydrated. Finally, water is used on millions of households around the world to do everyday things. 

3 Ways to conserve water:
- Take less time showering
- <span>Turn off the tap while brushing your teeth
- </span><span>Fix your leaks

Hope this helps.

</span>
6 0
3 years ago
If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the haematocrit is _______
nordsb [41]

Answer:

If 32 packed volume units of cells are separated from 46 volume units of plasma from a blood sample, the hematocrit is <u>41,02%</u> percent. The hematocrit value is <u>within the normal</u> range.

Explanation:

Hello!

Hematocrit (or packed cell volume -PCV-)is defined as the percentage of red blood cells (vol%) in a blood sample. One common method of determining it is by centrifuging a heparinized blood sample in a capillary tube at 10 000 RPM for five minutes. This separates the blood sample in two layers, formed elements (RBC and WBC) and Plasma.

The length of the layers is directly measured from the tube and represents the volume of packed cells and plasma. Since the number of white cells is negligible compared to the number of red cells, the formed elements are considered to represent the red blood cells.

The hematocrit can be calculated as the volume of packed cells divided by the total volume of the blood sample.

\frac{PCV}{TOTAL(pcv+plasma} * 100

<u>In the question:</u>

\frac{32}{32+46} * 100 = \frac{32}{78} * 100 = 41,02%

In humans the normal hematocrit range is 40,7% to 50,3% for men and 36,1% to 44,3%. Taking these reference values into consideration, this sample is within the normal range.

I hope you have a SUPER day!

4 0
3 years ago
Explain why it makes sense that the levels of estrogen and progesterone are low in blood of a female during menstruation
Art [367]

Answer:

At the beginning of the follicular phase, the lining of the uterus (endometrium) is thick with fluids and nutrients designed to nourish an embryo. If no egg has been fertilized, estrogen and progesterone levels are low. As a result, the top layers of the endometrium are shed, and menstrual bleeding occurs.

5 0
1 year ago
Help !!
Yuliya22 [10]

Answer:

Compare autotrophs to heterotrophs, and describe the relationship between these two groups of organisms. Autotrophs make their own energy, while a heterotroph must eat another organism to be able to get energy. ... Once the energy flows from the system it gets recycle for future use in other organisms.

7 0
2 years ago
Walking or biking to work is an example of an action that can support which goal?. A. reduce deforestation. B. reduce overpopula
Lena [83]
I would say C. Reduce climate change because taking a car/vehicle results in the earth becoming polluted which leads to climate change.  

*EXPLANATION*
Riding your bike or walking will not do anything to help people chopping down trees, people giving birth to more and more children nor will increase the amount of animals/organisms we have on our planet. 
5 0
3 years ago
Read 2 more answers
Other questions:
  • Two isotopes of the same element must have the same
    7·1 answer
  • Blonde hair is due to a recessive gene, while brown hair is dominant. Agnes has brown hair, but her mother was a blonde. Ralph,
    7·1 answer
  • The last common ancestor of all animals was probably a ________.
    12·1 answer
  • Can hermaphrodite humans reproduce with themselves
    13·1 answer
  • Emily is learning about the body systems and their functions. Which body 10 points
    15·1 answer
  • What type of bone cell is overly active in osteoporosis??
    14·1 answer
  • What are the functions of those roots of the Banyan tree?
    9·1 answer
  • What is a negative impact about engineer plans may have on the environment
    9·1 answer
  • Tell me as precisely as you can when hurricanes sandy hit Long Island.
    10·1 answer
  • BRAINLIST PLZZZ HELP<br><br> is gray siltstone <br><br> folding erosion or tilting
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!