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frez [133]
4 years ago
11

ecosystem productivity is principally limited by _______. a. sunlight and nutrient availability b. water and nutrient availabili

ty c. the availability of time and nutrients d. none of the above
Biology
2 answers:
lana66690 [7]4 years ago
7 0

Correct answer: A). Sunlight and nutrient availability

Sunlight and nutrients are the two important ingredients that are required by the plants in order to carry out the process of photosynthesis.

Green plants also called producers and they are known to fix solar energy and convert it into organic form as chemical energy. It is the green plant that is responsible for the primary productivity of the ecosystem.

Hence, sunlight and nutrients are the correct answer.





Pie4 years ago
5 0
A <span>sunlight and nutrient availability 

</span>
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When Mendel crossed purebred purple flowering plants (PP) with purebred white flowering plants (pp), what were the flower colors
zavuch27 [327]
The answer is <span>100 percent purple
</span>
Let P be dominant allele for purple flowers and p recessive allele for white flowers. So purebred purple flower has two P alleles and its genotype is PP and purebread white flower has two p alleles and its genotype is pp. Since P is dominant over p, when found together like in heterozygous plants (Pp), the flowers will express dominant allele and will be purple.
So, a cross between <span>purebred purple flowering plants (PP) with purebred white flowering plants (pp) will have 100% of the offspring with genotype Pp and purple flower color.
</span>
Parents:               PP      x       pp
Offspring:        Pp     Pp      Pp    Pp
3 0
3 years ago
Read 2 more answers
A female client arrives at the clinic reporting fatigue that is exhausting, bruising on the skin, and bleeding from the gums. Wh
Inessa05 [86]

Answer:

The diagnostic results and history findings that correlate with aplastic anemia are: White blood cell (WBC) count being less than 1,000/µL (1 ×109/L) , a platelet count of 50 ×103/µL (50 ×109/L) , recent bout with mononucleosis viral infection , and completed chemotherapy for leukemia in the past year.

Explanation:

<u>Aplastic anemia occurs when the body isn't producing enough blood cells, which leads to fatigue and a higher risk of infections and unstoppable bleeding.</u>

The most common form of aplastic anemia <u>occurs when the immune system attacks the stem cells in the bone marrow</u>, which can happen when: a) one is exposed to toxic chemicals, b) one went through chemotherapy, c) having an autoimmune disorder, or d) one suffered from a viral infection.

4 0
4 years ago
Does carbon dioxide move into the palisade mesophyll first in the leaf or the spongy mesophyll?
snow_lady [41]

Answer:

Spongy mesophyll layer.

Explanation:

because it's nearest to the region of gaseous exchange

6 0
3 years ago
nitrogen gas reacts with hydrogen gas to form ammonia.what are the reactants in this chemical reactions
Lera25 [3.4K]

The formula for this reaction would be

N + H3 ---> NH3

The first part of the reaction are the reactants and the second part is the product.

The reactants of this reaction are N and H3.

Or you could say the reactants are nitrogen and hydrogen

6 0
4 years ago
What would happen if the voltage gated sodium and potassium channels opened further apart?
masha68 [24]
It is unlikely the membrane would become depolarized because although Na+ is coming in, K+ would be leaving simultaneously (canceling each other out).   I hope my answer has come to your help. God bless and have a nice day ahead! Feel free to ask more questions.
6 0
4 years ago
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