Options for the question have not been provided. They are as follows:
Substances can pass through them
They are made of muscle
They are located throughout the body
They are made of bone
Answer:
Substances can pass through them
Explanation:
- When a wall or membrane is permeable, it means that substances can pass through it from one side to another.
- Alveoli and capillary have permeable walls.
- Alveoli are found in lungs. They need permeable walls for exchange of gases between the body and the environment.
- Capillaries are a type of blood vessels. They need permeable walls for exchange of nutrients and waste material between the blood and the tissue.
The answer should be the Hepatic portal vein.
Hope this helps.
Decrease resource use methods might be used to decrease the rate of approach to carrying capacity by the developed world
<u>Explanation:</u>
Carrying capacity is the greatest quantity of people of a supplied species that an area's sources can support frequently without significantly spending or diminishing those resources. For communities which increase exponentially, growth begins gradually, starts a fast maturity phase and then straightens off when the carrying capacity for that species has been touched.
The proportion of the population then shifts somewhat above or below the carrying capacity. Reproductive lag time may produce the population to exceed the carrying capacity temporarily. The carrying capacity may be reduced by resource leveling and disgrace during an overshoot period or spread through technological and social changes.
Answer:
B
Explanation:
I personal will go with B cause viruses attack your immune system then destroy healthy cells then copy it self through out the rest of the body.
Answer:
45 chromosomes (2n1 + n2)
Explanation:
The allotetraploid 2n1+2n2=60 has 60 chromosomes total, two sets of them of type 1 and two sets of chromosomes from the other type (2).
If the suspected type 1 parent is diploid with 30 chromosomes, then the allotetraploid has 30 type 1 chromosomes and 30 type 2 chromosomes.
<u>During meiosis, the germ cells reduce the total chromosome number by half.</u>
- The gametes produced by the allotetraploid will have 15 type 1 chromosomes and 15 type 2 chromosomes.
- The gametes produced by the suspected parent will have 15 type 1 chromosomes.
When these gametes combine during the backcross, the F1 zygote will have a diploid number of 30 type 1 chromosomes (15 coming from the allotetraploid and 15 coming from the suspected parent) and 15 type 2 chromosomes (which will be haploid because they all came from the allotetraploid).