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san4es73 [151]
2 years ago
8

What is the function of a pollen tube? 10 points

Biology
1 answer:
goldfiish [28.3K]2 years ago
6 0

Answer:

The answer would be A, to lead sperm cells to the ovary. Hope this helps you out!

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A. the tempatures on the islands
vlada-n [284]
B.) the available food on the islands
Since these different beaks were adaptions part of their evolution to be able to be more fit to survive with the food available on the island
8 0
2 years ago
In a population of plants, the allele for long stems is completely dominant over the allele for short stems. If 35% of the popul
KatRina [158]
Assumptions:
1. Equilibrium has been reached for the allele proportions
2. Absence of <span>evolutionary influences such as </span>mate choice<span>, </span>mutation<span>, </span>selection<span>, </span>genetic drift<span>, </span>gene flow<span> and </span>meiotic drive<span>.
</span>
Defining L=long stem, l=short stem, and L is dominant over l.
f(x) = frequency of allele x  (expressed as a fraction of population)
Then the Hardy-Weinberg equilibrium law applies:
p^2+2pq+q^2=1
where 
f(LL)=p^2
f(Ll)=2pq
f(ll)=q^2

Given f(ll)=0.35=q^2, we have
q=sqrt(0.35)=0.591608
p=1-q=0.408392
=>
f(Ll)
=2pq
=2*0.408392*0.591608=0.483216
= proportion of heterozygous population

Answer: percentage of heterozygous population is 48.32%
7 0
3 years ago
Where is the least amount of energy transferee in a food web ?
NeTakaya

Answer:

The least amount of energy is at the very told of the food web.

Explanation:

The very bottom has the most amount of energy! :) Hope I helped

7 0
3 years ago
Which of the following statements is true about tides?
Musya8 [376]
Tides are caused by the location of the earth, sun and moon.
5 0
3 years ago
What would happen if a person with sickle cell anemia received regular medical treatment
lyudmila [28]

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the procedure aims to replace the stem cells in the bone marrow the source of new red blood cells with healthy stem cells from a matching donor

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2 years ago
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