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IRINA_888 [86]
3 years ago
12

What are living this called?

Biology
1 answer:
gtnhenbr [62]3 years ago
4 0

biotic- living things

abiotic- non living things

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How do we humans affect the Nitrogen Cycle?
Svetach [21]
Human<span> population growth Fossil Fuels burning Automobiles, factories, power plants and other combustion processes that were stored in geological forms are sent back into the atmosphere by </span>human<span> actions which increase the amount of </span>Nitrogen<span>and </span>affect the Nitrogen cycle<span>.</span>
7 0
4 years ago
What is spermatogenesis and sporophyte?
lorasvet [3.4K]

Answer:

Explanation:

1. Production of sperm by meiosis

2. diploid generation which alternates with haploid (in plants)

4 0
2 years ago
Which trait is controlled by three or more genes?
SVETLANKA909090 [29]

Answer: D:Hair color in humans

Explanation:

6 0
3 years ago
Read 2 more answers
Cross a person who does not have freckles and is heterozygous for dimples with a person who has
Alja [10]

Answer:

1. 1/2

2. 1/2

3. 1/4

Explanation:

Let the allele for freckles be A or a while that of dimples be B or b.

A person without freckles but heterozygous for dimples = aaBb

A person who has freckles (whose mother has no freckles) but no dimples = Aabb

      aaBb    x    Aabb

Offspring

4 AaBb - freckled and dimpled

4 Aabb - freckled and non dimpled

4 aaBb - non freckled and dimpled

4 aabb - non freckled and non dimpled

1. <em>Probability that the parents will have a dimpled child</em> = 8/16 or 1/2

2. <em>Probability that they will have a child with freckles</em> = 8/16 or 1/2

3. <em>Probability that they will have a child with freckles and dimples</em> = 4/16 or 1/4

<u>See the attached image for the Punnet's square analysis of the cross</u>

4 0
3 years ago
Discuss why heart rate equals pulse rate at rest and after exercise.
denpristay [2]

<span>When a heart beats, blood is pushed through the body, causing a change in blood pressure and a pulse in main arteries. In healthy individuals, this means the heart rate is often synchronized with the pulse. However, heart rate and pulse rate are technically different because a heart rate measures the rate of contractions (heartbeats) of the heart, whereas a pulse rate measures the rate of palpable blood pressure increases throughout the body.</span>

For individuals who have certain heart conditions, the heart may not efficiently push blood through the body with each contraction. These individuals have a pulse that is lower than their heart rate. Other factors affecting heart rate and blood pressure include body mass, athleticism, obesity, medication, alcohol use, and smoking. For most people, each contraction produces a pulse, so the pulse is an effective way to measure heart rate. Baseline heart rates are resting heart rates, measured by taking the pulse.

While in exercise for most people, heart rate and pulse will not go above 220 beats/minute during these times, nor should that high of a heart rate be accepted for more than minutes based on activity level and duration as a variety of studies reported by Cleveland Clinic indicate that repetitive, excessive heart rate experienced, for example, by repeat marathon runners, may cause heart muscle damage leading to arrhythmia (irregular heart palpitations) and an assortment of heart conditions.

<span> Normal, healthy adults who are reasonably fit and not overweight, and do not smoke or drink heavily, will have resting heart rates between 60 and 100 beats per minute (bpm); their pulse will reflect this. Average, healthy teenager heart rates are the same as those for adults, while children under 10 years of age experience higher heart rates and pulses:</span>

<span>·         </span>Newborns (1-30 days old) = 70-190

<span>·         </span>Infants (1-11 months = 80-160

<span>·         </span>Toddlers (1-2 years old) = 80-130

<span>·         </span>Preschoolers (3-4 years old) = 80-120

<span>·         </span>Elementary Age (5-10 years) = 70-115

Athletes share the same range with others in their age group, but teen and adults who are excessively active and fit may have resting heart rates and pulses as low as 40 bpm.

 

<span> </span>

5 0
3 years ago
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