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nadezda [96]
2 years ago
9

Analysis of the nucleotide sequences of genes coding for phytochrome pigments suggest that the ancestors of angiosperms were ada

pted for survival in ____.
Biology
1 answer:
lilavasa [31]2 years ago
5 0

Answer:

c. shady forests.

Explanation:

According to a different source, these are the options that come with this question:

a. freshwater aquatic environments.

b. sunny, xeric habitats.

c. shady forests.

d. habitats with very cold winters.

e. oceans.

Angiosperms are plants that have stems, roots and leaves. Moreover, these plants have seeds in a flower. Usually, angiosperm eggs are fertilized through pollination in a flower. Flowers have both male and female reproductive organs. Based on the analysis of the nucleotide sequences of genes, it appears that the ancestors of angiosperms were adapted for survival in shady forests.

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Anton Leeuwenhoek Devised a primitive microscope to observe a sample of his tooth scrapings. How did this help contribute it to
4vir4ik [10]

Answer:

C- it help to show that some bacteria are just one cell.

Explanation:

Anton Leeuwenhoek was the first scientist who observed the presence of bacteria in his tooth scratch under the microscope made by himself. At that time there was no concept of bacteria and he named those small creatures as animalcules which were later termed as bacteria.

Leeuwenhoek during 1670s  sent the details of his experimentation on algae and bacteria to Royal Society of London.

It was due to his that primitive experiment that made the discovery of bacteria and make it known to other scientists. Therefore option C is the best option that demonstrates that bacteria are single celled organisms that are very minute. When we look at cell theory there is a postulate that shows that cell is the fundamental unit of function and structure  of all living organisms. So, the work of Anton Leeuwenhoek holds substantial importance in the formulation of cell theory.

Hope it helps!


6 0
2 years ago
Which two factors contributed to creating a truly global culture? a decrease in population growth rate improvements in telecommu
lora16 [44]

Answer:

1. Improvements in telecommunication

2. Improvements in global travel

Explanation:

Global culture refers to <u>the transmission of beliefs, values, and ideas around the world that has a significant impact in the behavior of society</u>. This has been evolving through time, especially since the Industrial Revolution. Today, we are capable of communicating with other people as quickly and easy as ever in the history of humanity and this will keep evolving as technology evolves as well.

This evolution is due to science and technology, especially to the improvements in telecommunication, which <u>enables us to communicate with people from other countries through calls, social media messagings, e-mails, etc.</u>, and to the improvements in global travel, which is <u>much more accessible today than it was before, allowing individuals to move from one country to the other easily and constantly and improving socialization between people from different cultures and backgrounds.</u>

5 0
2 years ago
Read 2 more answers
N a lab you are conducting tests with various chemicals and neurotransmitter receptors. you notice that exposed frog muscle cell
Vadim26 [7]
The effect of a neurotransmitter is based on the properties of the receptor more than the neurotransmitter.
4 0
2 years ago
Gene A has two alleles (A1 and A2). A1A1 homozygotes are twice as likely to survive from birth to reproductive age as heterozygo
Usimov [2.4K]

Answer:

The correct answer is C: <em>0.60 </em><em>A1</em> and <em>0.40 A2</em> will be the allele frequencies in those progeny when they reach reproductive age

Explanation:

<em>Genotype</em>                                <u><em>A1A1 </em></u><em>  </em><u><em>A1A2</em></u><em> </em><u><em>A2A2 </em></u>

<em>Relative aptitude, w</em>                  1           0.5    0.5

<em>Number of individuals</em>                 40            40     40

<em>Initial allelic frequency</em>      p0= (40+20)/120=0.5    q0= (40+20)/120=0.5

<em>Zygote frequency</em>                  p2= 0.25 2pq=0.25 q2=0.625

<em>Relative contribution</em>         0.25x1=0.25     0.5x0.5=0.25 0.25x0.5=0.125

<em>of each genotype</em>              

<em>Average aptitude W</em>              W= 0.025 + 0.25 + 0.125 = 0.625

<em>Population</em>                    AA= 0.25/0.625    AB=0.25/0.625  BB=0.125/0.625

<em>Genotype frequency</em>             AA= 0.4             AB=0.4          BB=0.2  

<em>New Allelic frequency</em>       p1=0.4+(0.4/2)=0.6   q1=0.2+(0.4/2)=0.4

  • <em>Total number of individuals</em>: 120
  • <em>Initial allelic frequency</em>:

                  (number of homozygote individuals + half number of  

                   heterozygote individuals) / Total number of individuals

  • <em>Relative contribution of each genotype</em>:

                           Zygote frequency x Relative aptitude

  • <em>Average aptitude W</em>: It is the sum of relative contribution of each genotype to the next generation.  

                    wA1A1 x p2 + WA1A2 x 2 x p x q + WA2A2 x q2

  • <em>Population Genotype frequency</em>:

                Relative contribution of each genotype / Average aptitude

  • <em>Allelic frequency</em>:

                      Homozygote population genotype frequency +  half  

                           heterozygote population genotype frequency

8 0
2 years ago
There are several properties of water that make Earth a suitable environment for life, including water's high boiling point and
Trava [24]

Answer: D.) It allows water to resist freezing and thawing cycles.

The ability of the water molecule to absorb and retain heat is called as heat capacity of water, because of this property the temperature of water remains the same for long, irrespective of the external environment. It allows water to resist freezing and thawing cycles because water molecules will resist change in it's temperature. This temperature regulation will prevent instant heating and cooling, hence, will provide suitable environment for the survival of marine organisms.  

3 0
2 years ago
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