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BlackZzzverrR [31]
3 years ago
10

Robert decides to go for a run when he gets home from school. As he begins running, his breathing rate starts to increase. What

are the mechanisms that cause his breathing rate to increase?
Biology
1 answer:
Lubov Fominskaja [6]3 years ago
3 0

Answer:

When oxygen levels in the blood decrease, the respiratory center sends signals to the diaphragm to increase the rate at which it contracts and relaxes.

Explanation:

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Conduct a dihybrid cross of pea plants with the following combination of traits: Parent 1—Tall plant with white flowers (pure br
Angelina_Jolie [31]

Answer:

i) Genotype of Parent 1= TTpp

Genotype of  Parent 2= ttPP

ii) The genotypes of their gametes

Parent 1= Tp

Parent 2= tP

iii) F1 generation = All TtPp (tall and purple flower)

iv) F2 phenotype ratio= 9 tall, purple: 3 tall, white: 3 dwarf, purple : 1 dwarf, white.

F2 Genotype ratio= 1:2:1:2:4:2:1:2:1

Explanation:

Let's assume that allele "T" gives tall plants while allele "t" imparts dwarfism. Likewise, the dominant allele "P" is responsible for purple flowers while recessive allele "p" gives white flowers.

i) Genotype of Parent 1—Tall plant with white flowers (pure breeding)= TTpp

Genotype of  Parent 2—Dwarf plant with purple flowers (pure breeding)= ttPP

ii) The genotypes of their gametes

Parent 1= Tp

Parent 2= tP

iii) F1 generation = All TtPp (tall and purple flower)

iv) Each of the F1 plant with TtPp genotype will form four types of gametes= TP, Tp, tP and tP

A cross between TtPp x TtPp gives F2 progeny in following ratio=

F2 generation phenotype ratio= 9 tall, purple: 3 tall, white: 3 dwarf, purple : 1 dwarf, white.

Genotype ratio= 1:2:1:2:4:2:1:2:1

5 0
2 years ago
The series of changes that occur after a disturbance in an existing ecosystem is: *
Alex

Answer:

B- Secondary adaption

8 0
3 years ago
What is a scotobacteria
KatRina [158]
Commonly called the enterics due to the fact that they inhabit the intestinal tracts of humans and other animals.
6 0
3 years ago
Read 2 more answers
Where should the origin of the corona be placed on the phylogenetic tree?
Ivahew [28]
At the base of rotifera
4 0
3 years ago
An energy pyramid shows the amount of_______<br> available at each feeding level in an ecosystem
Amanda [17]

Answer:

Energy

Explanation:

An energy pyramid shows the amount of energy available at each feeding level in an ecosystem.

5 0
3 years ago
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