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bearhunter [10]
3 years ago
7

How long does a regular menstrual cycle last?

Biology
2 answers:
natima [27]3 years ago
6 0
Lasts about five to seven days

yaroslaw [1]3 years ago
4 0
The average amount of time for a regular menstrual cycle is about 28 days.
You might be interested in
The dart thrower was throwing at the bullseye. what is the best description of this attempt?
stepan [7]

Answer:

A. Accurate but not precise

Step-by-step explanation:

The illustration given shows that the was far from each other which means it is not precise because precision is that the given data must be close to each other. However, it is accurate because the darts are closer to the bullseye which can still be considered as accurate. Therefore, I believe this is accurate but not precise.

5 0
2 years ago
Intervertebral discs are made up of fibrocartilage, which exhibits a large amount of tensile strength, enabling it to absorb sho
Vika [28.1K]

Answer:

Collagen fibers

Explanation:

Cartilage is the connective tissue found in the mammalian group of animals and is composed of the collagen fibre made by the chondrocytes which occur at the scattered sites.

The fibrocartilage is one of the types of cartilage present in the intervertebral disks and helps provide the tensile strength and help absorb the shock in the spine.

The extracellular matrix of fibrocartilage is enriched with the collagen fibres which provides toughness and great tensile strength to the cartilage.

Thus, Collagen fibres are the correct answer.

3 0
3 years ago
An owl has good night vision because its eyes can detect a light intensity as small as 5.0 × 10-13 W/m2. What is the minimum num
Lady bird [3.3K]

Answer:

Thus, the minimum number of photons per second is 77.34

Explanation:

Light intensity, I_{min} =  5\times 10^{-13} W/m^{2}

Pupil has a diameter, d = 8.5 mm

                                      = 8.5 x 10^{-3} m

Radius of the eye, r = 4.25 x 10^{-3} m

∴ Area of the eye, A = \pi .r^{2}

                                 = 3.14\times \left ( 4.25\times 10^{-3} \right )^{2}

                                = 5.6\times 10^{-5} m^{2}

Let P_{min} be the minimum number of photons.

Therefore, P_{min} = I_{min} x A

                                              = 5\times 10^{-13} x 5.6\times 10^{-5}

                                             = 2.8\times 10^{-17} W

Thus the minimum number of photons is given by

N_{min}=P_{min}/E

where E = hc/\lambda

             = \left (6.63\times 10^{-34}\times 3\times 10^{8}  \right )/548\times 10^{-9}

            = 3.62\times 10^{-19} J

Therefore, N_{min} = \frac{2.8\times 10^{-17}}{3.62\times 10^{-19}}

                                              = 77.34 photons per second

Thus, the minimum number of photons per second is 77.34

4 0
3 years ago
Which of the following best describe gas particles?
gregori [183]

Answer:

a, b-colliding, d -high energy

8 0
3 years ago
The illegal killing or capturing of wild animals is called ?
UkoKoshka [18]
Poaching is what it is called
4 0
3 years ago
Read 2 more answers
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