1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Harman [31]
3 years ago
10

True or false? one advantage of having a tube-like digestive tract is that digestion of all compounds can take place simultaneou

sly down the tract.
Biology
1 answer:
USPshnik [31]3 years ago
3 0
True I think pls tell me if I'm wrong or correct
You might be interested in
PLEASE PLEASE HELP ME!!!! (10 POINTS!)
Oksi-84 [34.3K]

Answer:

 

en Espanol en Español     print print

Bottlenecks and founder effects

Genetic drift can cause big losses of genetic variation for small populations.

Population bottlenecks occur when a population's size is reduced for at least one generation. Because genetic drift acts more quickly to reduce genetic variation in small populations, undergoing a bottleneck can reduce a population's genetic variation by a lot, even if the bottleneck doesn't last for very many generations. This is illustrated by the bags of marbles shown below, where, in generation 2, an unusually small draw creates a bottleneck.

Loss of genetic variation as a result of a population bottleneck

Download this graphic from the Image library.

Reduced genetic variation means that the population may not be able to adapt to new selection pressures, such as climatic change or a shift in available resources, because the genetic variation that selection would act on may have already drifted out of the population.

Elephant seal

 

An example of a bottleneck

Northern elephant seals have reduced genetic variation probably because of a population bottleneck humans inflicted on them in the 1890s. Hunting reduced their population size to as few as 20 individuals at the end of the 19th century. Their population has since rebounded to over 30,000 — but their genes still carry the marks of this bottleneck: they have much less genetic variation than a population of southern elephant seals that was not so intensely hunted.

Founder effects

A founder effect occurs when a new colony is started by a few members of the original population. This small population size means that the colony may have:

reduced genetic variation from the original population.

a non-random sample of the genes in the original population.

For example, the Afrikaner population of Dutch settlers in South Africa is descended mainly from a few colonists. Today, the Afrikaner population has an unusually high frequency of the gene that causes Huntington's disease, because those original Dutch colonists just happened to carry that gene with unusually high frequency. This effect is easy to recognize in genetic diseases, but of course, the frequencies of all sorts of genes are affected by founder events.

Explanation:

7 0
3 years ago
How would you argue that viruses are living things?
slamgirl [31]

Answer:

Viruses are complicated assemblies of molecules, including proteins, nucleic acids, lipids, and carbohydrates, but on their own they can do nothing until they enter a living cell. Without cells, viruses would not be able to multiply. Therefore, viruses are not living things

6 0
3 years ago
Read 2 more answers
What was the purpose of the vinegar In the third trial?
Free_Kalibri [48]

A)test the effect of raising Ph on enzyme action

5 0
3 years ago
Read 2 more answers
50 points! pls help!
iren [92.7K]

Answer:

1. Latitude. Kuala Lumpur is located in the equatorial zone, near the equator, so it receives a lot of sun for the  entire year, and this explains its warm climate.

2. The main reason for this difference is the altitude: while Minsk is located at 280 meters over the sea level, Banff is located at approximately 1400 meters over the sea level. As the altitude is higher, the average temperature is lower.

3. Jakarta: in fact, it is located at a similar altitude of Kuala Lumpur (just in the opposite hemisphere), in the equatorial zone, while Baltimore is located much more north, so in a colder region.

4. Because they are located at approximately same latitude (just in the opposite hemisphere), so they are more or less same distance from the equator, and they receive more or less same amount of sun light, therefore they have similar climate.

4 0
2 years ago
Read 2 more answers
I need the answer to 1,3,4,5, and 6
EastWind [94]
1- Synthesize this hormone
3- a decrease in the amount of glucose in the blood
4- may have fewer side effects then the insulin previously extracted from the pancreas of other animals
5- release of insulin
6- different parts of an individual's DNA are used to direct the synthesis of different proteins...
4 0
3 years ago
Other questions:
  • What is a plasmid? How is a plasmid used in gene splicing?
    9·2 answers
  • What function do nucleic tides serve besides storing genetic information
    7·1 answer
  • What does the mitochondria do in an animal cell?
    13·1 answer
  • What is an organelle used to store the materials needed by the cell. it's also used for storing waste?
    6·2 answers
  • Which type of population growth is shown in this graph? Population of Bacteria mc012-1.jpg
    11·2 answers
  • What is the dependent variable that impacts the amount of solar energy in a location. I really need help with question.
    6·2 answers
  • Which situation is an example of equilibrium
    14·1 answer
  • You are told to identify the cells on a microscope slide as either plant, animal, or bacterial. You look at the cells to find th
    13·1 answer
  • How does the catalyst affect the energy curve ?
    13·1 answer
  • Match each term to its description.
    6·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!