A. AABb
B.AaBb
C.aaBb
D.AaBB

Answer:

Materials

• Scrap piece of paper

• Pen or pencil

• Clock or timer that shows seconds or a helper with a watch

• Comfortable exercise clothes (optional)

• Calculator

Preparation

• Practice finding your pulse. Use the first two fingers of one hand to feel your radial pulse on the opposite wrist. You should find your radial pulse on the "thumb side" of your wrist, just below the base of your hand. Practice finding your pulse until you can do it quickly. (You can alternatively take your carotid pulse to do this activity, but be sure you know how to safely take it and press on your neck only very lightly with your fingers.)

• Measure your resting heart rate, which is your heart rate when you are awake but relaxed, such as when you have been lying still for several minutes. To do this, take your pulse when you have been resting and multiply the number of beats you count in 10 seconds by six. This will give you your resting heart rate in beats per minute (bpm). What is your resting heart rate? Write it on a scrap piece of paper.

• You will be measuring your heart rate during different types of physical exercises over a period of 15 minutes. Choose at least two different exercises. Some examples include jumping rope, lifting a two-pound weight, riding a bike, hula-hooping, walking, etc. Gather any needed materials. (If you want to make a homemade hula-hoop, steps for doing this are given in the activity Swiveling Science: Applying Physics to Hula-Hooping .) Do you think the activities will affect your heart rate differently? How do you think doing each activity will affect your heart rate?

Procedure

• Choose which exercise you want to do first. Before starting it, make sure you have been resting for a few minutes so that your heart is at its resting heart rate.  

• Perform the first exercise for 15 minutes. While you do this, write down the number of beats you count in 10 seconds after one, two, five, 10 and 15 minutes of activity. (You want to quickly check your pulse because it can start to slow within 15 seconds of stopping exercising.) How do the number of beats you count change over time? How did you feel by the end of the exercise?

• Calculate your heart rate after one, two, five, 10 and 15 minutes of exercise by multiplying the number of beats you counted (in 10 seconds) by six. How did your heart rate (in bpm) change over time?

• Repeat this process for at least one other exercise. Leave enough time between the exercises so that your heart rate returns to around its normal resting level (this should only take a few minutes). How did you feel by the end of the second exercise? How did your heart rate change over time for this exercise?  

• Take a look at the results you wrote down for this activity. Which exercise increased your heart rate the most? Which exercise increased your heart rate the fastest? Which exercise(s) elevated your heart rate to the target heart rate zone (50 to 85 percent of your maximum heart rate, where your maximum heart rate is 220 bpm minus your age)? Do you notice any consistent patterns in your results?

• Extra: Try this activity again but test different physical exercises. How does your heart rate change when you do other exercises? How are the changes similar and how are they different?

• Extra: Measure your heart rate while lying down, while sitting down, and while standing. How does your heart rate change with body position?  

• Extra: Repeat this activity with other healthy volunteers. How does their heart rate compare to yours? How does their change in heart rate while exercising compare to how yours changed?  

• Extra: Try this activity again but vary the intensity of your exercise. What intensity level elevates your heart rate to 50 percent of its maximum heart rate? What about nearly 85 percent of its maximum? Be sure not to exceed your recommended target heart rate zone while exercising

Explanation:

If you did a moderately intense exercise, such as walking, you may have seen an initial jump in your heart rate (where your heart rate falls within the lower end of your target heart rate zone within about one minute of exercise), but then your heart rate only slowly increased after that. After 15 minutes, you may have reached the middle of your target heart rate zone. To reach the upper end, people usually need to do a moderately intense exercise for a longer amount of time (such as for 30 minutes). If you did a more strenuous exercise—hula-hooping, for example—you may have seen a higher initial bump in your heart rate (such as reaching the middle of your target heart rate zone after just one minute of exercise), and then your heart rate stayed about the same for the remaining 14 minutes of exercise. Overall doing a more strenuous exercise generally raises a person's heart rate faster compared to doing an exercise that is only moderately i

Answer:

B. 3.12 x [tex]10^{-3}[/tex] m

Explanation:

From the given picture, it can be deduced that;

the diameter of the image of lumen = 25.0 mm

                                                      = 25.0 ÷ 1000

                                                      = 0.025 m

And,

magnification = [tex]\frac{diameter of the image of lumen}{actual diameter of lumen}[/tex]

But magnification = 8,and diameter of the image of lumen = 0.025 m.

So that;

8 = [tex]\frac{0.025}{actual diameter of lumen}[/tex]

⇒ actual diameter of lumen = [tex]\frac{0.025}{8}[/tex]

                         = 0.003125

Actual diameter of lumen of the blood vessel is 3.12 x [tex]10^{-3}[/tex] m.

Answer:

Thinnest under the oceans and thickest under continents

Explanation:

Answer: Thinnest under the oceans and thickest under continents

Answer:

unicellular is a organism that is only one cell. most of the time they are your bacteria and viruses. while a multicellular organism is a organism with many cells. can be anything from something you cant to to plants and animals that you can see

Explanation:

Answer:

The worker bees are female, but they do not breed. The queen bee is female and creates all the babies for the hive. The drone bees are male and do not have a sting. Bees communicate with each other about food sources using dances.

Explanation:

Answer:

Its A.

Explanation:

I just took the quiz trust me :D

Answer:

They provide high-density urban areas with space for outdoor recreation.

Explanation:

I just took the quiz.

Answer:

The control group receives either no treatment, a standard treatment whose effect is already known, or a placebo (a fake treatment).

Answer:

is the process in nature by which organisms better adapted to their environment tend to survive and reproduce more than those less adapted to their environment. For example, treefrogs are sometimes eaten by snakes and birds

Explanation:

It's sorta like adapting with extra steps.

Answer: Natural Selection

Explanation: Individuals in a species have variation or mutations.

These differences may either be helpful, such as a giraffe with a long neck, or unhelpful, such as a colour variance in a moth that makes them stand out to predators.

The individuals that are more suited to their environment will survive and breed, passing on their genes.

Those that are not suited will die and their genes will not be in the  ‘gene pool’.

This is the survival of the fittest!

Answer:

TAC GCA TTA ATA

and apparently my answer needs to be 20 charcters long

Answer:

No, it does not, because the octet rule says that an atom needs to have eight electrons in its valence shell to be stable. The exceptions are hydrogen and helium, which need only two electrons

Answer: No it doesn’t

Explanation:

Answer:

1.732 seconds

[tex]s=ut+\dfrac{1}{2}at^2[/tex]

Explanation:

s = Displacement of ball = 15 m

g = a = Acceleration due to gravity = [tex]10\ \text{m/s}^2[/tex]

u = Initial velocity of the ball = 0

t = Time taken

From the kinematic equations we use the following formula

[tex]s=ut+\dfrac{1}{2}at^2\\\Rightarrow 15=0t+\dfrac{1}{2}\times 10t^2\\\Rightarrow t=\sqrt{\dfrac{15\times 2}{10}}\\\Rightarrow t=\sqrt{3}=1.732\ \text{s}[/tex]

The object will reach the ground after 1.732 seconds.

The formula used is [tex]s=ut+\dfrac{1}{2}at^2[/tex].

Answer:

D. 4

Explanation:

Reflection can be defined as a phenomenon which typically involves a change in the direction of a ray of light or waves as it falls on a smooth surface.

Simply stated, reflection occurs when a ray of light or wavefronts bounces off a smooth surface.

From the diagram provided above, the thin beam of light which illustrates reflection is the fourth because as it hit the surface, it bounced back to the medium from which it was originally propagated with.

Answer: One component, called shared environment, includes all environmental influences that make children in a family similar to one another.

Explanation: Environmental variance not due to shared environment is called nonshared environment; this portion of environmental variance makes family members different from one another.

Answer:

rock that forms when existing rock changes to a new rock because of heat and pressure

Answer:

GGG

Explanation:

Use AT GC to replicate DNA sequence

Answer:

I believe the correct answer is asexual reproduction because they can reproduce fast, and with multiple offspring. Hope this helped you!

Answer:

mitochondria and nucleus

Answer:

true

Explanation:

ED 2020

Answer:

The answer is false

Explanation:

ED 2021

Answer:

radiometric dating methods

Explanation:

The oldest rock layer will be at the very bottom, and as time goes on, more layers will form making the top layer the youngest layer and the bottom layer the oldest. This method can determine the amount of radioactive decay of certain elements which can help them make a geologic time scale.

Answer:

C

Explanation:

Protiens, Carbohydrates, and Lipids all influence bodily processes.

Answer:Metaphase

Explanation:

Answer:

C

Explanation:

Explanation:

You didn't attach a picture so i'll just explain how to find the number of stomatas/mm^2.

first you find the surface by multiplying the length by the width

0.1*0.1=0.01mm^2

now you count the numer of stomatas in the picture

in0.01mm^2 you have.........................x stomatas

in 1mm you have ...............................y stomatas

y=100x

Answer:

1. The difference between the normal hemoglobin protein DNA sequence and the sickle cell hemoglobin DNA sequence is a base to base shift, in this case adenine (GAG) to thymine (GTG).

2. The difference affects the amino acid sequence of the protein by replacing glutamic acid (Glu) with valine (Val).

Explanation:

In sickle cell anemia, a change in the DNA nucleotide sequence is observed, where adenine is substituted by thymine, whose expression is the change in the amino acid sequence of globine β, incorporating valine instead of glutamic acid. This represents a molecular mutation - point mutation - by subtitution, which corresponds to missense mutation.

Normal hemoglobin protein in a RBC

DNA                 CTG ACT CCT GAG GAG AAG TCT

Amino acids     Leu  Thr   Pro   Glu   Glu   Lys   Ser

Sickle cell hemoglobin protein in a RBC

DNA                 CTG ACT CCT GTG GAG AAG TCT

Amino acids     Leu  Thr   Pro   Val   Glu   Lys   Ser

When GAG is transcribed to mRNA, the CUC codon is obtained, which codes for glutamic acid. Thymine substitution causes the DNA sequence to change to GTG, which is transcribed as CAC, the codon that encodes the amino acid valine. The change from glutamic acid to valine in β-globin causes an altered hemoglobin, giving the abnormal erythrocytes observed in sickle cell disease.

Answer

Igneous Rock

Explanation:

It's Igneous because its coming straight from the magma. This type of rock is basically a magmatic rock.