African elephants once existed in large populations across the African continent. Elephants use their tusks to dig for water and food. Humans hunt and kill elephants for their tusks. Habitat loss and fragmentation have also reduced the total number of elephants and the size of elephant herds. Scientists estimate that the number of African elephants has decreased from several million to several hundred thousand. Population sizes range from over 100,000 individuals in Botswana to approximately 100 individuals in northern Cameroon. Scientists have also found that the frequency of elephants that never develop tusks is increasing.
Select all the statements that describe probable effects of poaching and habitat fragmentation on clephant evolution
a. The elephant population in Botswana will experience high levels of genetic drift.
b. The poaching of elephants for their tusks is leading to the evolution of tuskless elephants.
c. Having tusks does not provide a selective advantage to African elephants.
d. Habitat fragmentation leads to decreases in population size and increases in genetic drift.
e. The elephant population in Cameroon will experience high levels of genetic drift.

Answers

Answer 1

Answer:

Option D

Explanation:

In habitat fragmentation, a large ecosystem or habitat of any species is converted into small ecosystems in such a way that each small ecosystem remains isolated from each other. Being isolated , random genetic drift comes in picture and reduces the gene flow with in the isolated habitats.

Hence, option D is correct


Related Questions

If the n number of an organism is 13, then the 2n number would be?

A.1
B.7
C.13
D.26

Answers

Well 2*13=26 . So D would be correct

For each pair of structural elements, indicate whether the first element is a constituent part of the second, whether the second element is a constituent part of the first, and whether they are separate structures with no particular relationship to each other.
Mitochondrion; crista
Mitochondrion is a constituent part of crista.
Crista is a constituent part of mitochondrion.
Mitochondrion and crista are separate structures with no particular relationship to each other.
Golgi complex; nucleus
Golgi complex is a constituent part of nucleus.
Nucleus is a constituent part of Golgi complex.
Golgi complex and nucleus are separate structures with no particular relationship to each other. Cytoplasm; cytoskeleton
Cytoplasm is a constituent part of cytoskeleton.
Cytoskeleton is a constituent part of cytoplasm.
Cytoplasm and cytoskeleton are separate structures with no particular relationship to each other.
Nucleolus; nucleus
Nucleolus is a constituent part of nucleus.
Nucleus is a constituent part of nucleolus.
Nucleolus and nucleus are separate structures with no particular relationship to each other. Smooth ER; ribosome
Smooth ER is a constituent part of ribosome.
Ribosome is a constituent part of smooth ER.
Smooth EP. and ribosome are separate structures with no particular relationship to each other. Lipid bilayer; plasma membrane
Lipid bilayer is a constituent part of plasma membrane.
Plasma membrane is a constituent part of lipid bilayer.
Lipid bilayer and plasma membrane are separate structures with no particular relationship to each other.

Answers

Answer:

See explanation below

Explanation:

1.) The crista is a constituent part of the mitochondrion.

2.) The Golgi complex and the nucleus are separate structures with no particular relationship to each other.

3.) The cytoskeleton is a constituent part of the cytoplasm

4.) The nucleolus is a constituent part of the nucleus.

5.) The smooth ER and the ribosome are separate structures with no particular relationship to each other.

6.) The Lipid bilayer is a constituent part of the plasma membrane.

This is the part of a flower that helps attract animals in order to aid in pollination.


It also starts with pe

Answers

Answer:

Petals?

Explanation:

:)

______ are plants that produce seeds and flowers.
Gymnosperms
Angiosperms
Ferns
Mosses​

Answers

Answer:

b i think

Explanation:

if not its a

Answer:

1st one

Explanation:

Which photon has the greatest amount of energy?

Answers

Answer:

Gamma rays, a form of nuclear and cosmic EM radiation, can have the highest frequencies and, hence, the highest photon energies in the EM spectrum.

Explanation:

Explain the benefits for the administration of an isotonic solution?

Answers

The isotonic solution allow the cells to move water and nutrients in and out of the cells. This is necessary for blood cells to perform their function of delivering oxygen and other nutrients to other parts of the body.

Rudy is analyzing a list of statements about structural organization within
the human body. The chart shows the list of statements.
1
2
3
Human Body Structural Organization
The human body has more systems than cells
The human body has more cols than systems
Cabs are made up of different tissues.
Organs are made up of cells and tissues
Systems are more complex than organs
4
S
Which statements are true?
1 and 2
2 and 3
2.4 and 5
3.4 and 5

Answers

Answer: 2, 4 and 5.

Explanation:

Human system are made of various organs which in turn are made up of various tissues which in turn are made up of various cells. Cells are therefore much more numerous than systems.

As already mentioned, organs are made up of tissues which are made up of cells so statement 4 is right.

As systems are made up of various organs working together, they are more complex than the individual organs. For instance, the Muscular system is more complex than the triceps or bicep muscles.

Which of the following is a true description of the green alga Spirogyra sp.?
Select one:
a. The alga has a branched, multicellular, filamentous habit.
b. The chloroplast with its pyrenoids is arranged spirally throughout each filament.
c. Most of the interior of each cell is occupied by cytoplasm.
d. Gametic meiosis takes place via the process of conjugation between filaments.

Answers

It’s see most of the interior of each cell is occupied

In pea plants, height is determined by an allele for tallness (T) that is dominant over an allele for shortness (t). What is the probability that a gamete, selected at random, would carry the short allele (t) in a cross of heterozygous tall pea plants?

A. 1/8
B. 1/4
C. 1/2
D. 3/4

Answers

Answer:

C. 1/2

Explanation:

I took the test and got it right.

Heterozygous organisms show presence of two alternatives alleles for same trait. For plant height, a heterozygous tall plant, will show both the T (for tallness) and t (for shortness) alleles, as T allele is dominant over t allele. When a cross is made between heterozygous tall plants (Tt), there are 50% chances that a randomly selected allele will carry allele for shortness (t) as shown below:
Thus, "the probability that a randomly selected gamete will carry 't' allele in a cross between heterozygous tall pea plants, is 1/2."

TMV Assembly Each of these statements is an experimental observation concerning the reassembly of tobacco mosaic virus (TMV) virions from TMV RNA and coat protein subunits. In each case, carefully state a reasonable conclusion that can be drawn from the experimental finding.
a. When RNA from a specific strain of TMV is mixed with coat protein from the same strain, infectious virions are formed.
b. When RNA from strain A of TMV is mixed with coat protein from strain B, the reassembled virions are infectious, giving rise to strain A virus particles in the infected tobacco cells.
c. Isolated coat protein monomers can polymerize into a virus-like helix in the absence of RNA.
d. In infected plant cells, the TMV virions that form contain only TMV RNA and never any of the various kinds of cellular RNAs present in the host cell.
e. Regardless of the ratio of RNA to coat protein in the starting mixture, the reassembled virions always contain RNA and coat protein in the ratio of three nucleotides of RNA per coat protein monomer.

Answers

Answer:

Explanation:

tobacco mossaic virus is aa RNA containing virus enclosed in aaprotein coat. in above sttaed experiment when TMV cause infection in tobacco plant is leaves get infected due to replication of virus in its cells. RNA is first converted into complementary DNA and form a double stranded nucliec acid structure. it syntheaize its protein to make new coats and to wrap the newly synthesized RNA, and make a completely infected new virus which we called virion. in any case the number of coats are equal to RNA so that to prepare new viruse. n

The oxygen released during photosynthesis comes from molecules of water
True or False

Answers

Answer: False

Photolysis takes place in the light dependent reaction of the photosynthesis. The reaction can be represented as:  H 2 O + 2 photons --> 2 e  −   + 2H  +   + O.  Here, the electrons released are accepted by the photosystem to fulfill the electron gap. The last electron acceptor is the oxygen and thus, the oxygen is liberated from the water molecule. The experiments conducted by Samuel Ruben and Martin Kamen by using radioactive isotopes helped to prove that the oxygen liberated during photosynthesis came from photolysis the water.

Explanation:

Photosynthesis is the process in which light energy is converted to chemical energy in the form of sugars. In a process driven by light energy, glucose molecules (or other sugars) are constructed from water and carbon dioxide, and oxygen is released as a byproduct.Carbon dioxide is released during photosynthesis. Plants which synthesise their food themselves are called saprotrophs.

Define Global Warming

Answers

Answer:

a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.

Answer:

a gradual increase in the overall temperature of the earth's atmosphere generally attributed to the greenhouse effect caused by increased levels of carbon dioxide, chlorofluorocarbons, and other pollutants.

Explanation:

Which is the definition of an amino acid?
a fatty acid that has no double bonds between carbon atoms
a protein building block
a type of carbohydrate that is difficult for humans to digest
a simple sugar that is the body's basic fuel

Answers

Answer:

I'm pretty sure it's a protein building block

3. Earthquakes are most likely to occur near?

O Fault

O Ocean

O Mountain

O Tsunami

Answers

Answer:

Earthquakes are most likely to occur near oceans because of the ocean plates sliding against one another

Explanation:

BRAINLIEST PLEASE

You are looking at the color of feathers in ducks and find that Green feathers (G) are dominant to yellow feathers (g). However, a second gene, H, controls whether the color will be expressed in the feathers. If the duck is hh, the duck will always be white, because the pigment does not go into feathers. What ratio of phenotypes in the progeny would you expect following a dihybrid cross

Answers

Answer:

Option C , 9:3:4

Explanation:

The options for the questions are there in the attachment

Solution-

This is the case of recessive epistasis in which recessive allele has a masking effect on  alleles G and g.

GgHh * GgHh

The offspring will be

GH Gh gH gh

GH GGHH GGHh GgHH GgHh

Gh GGHh GGhh GgHh Gghh

gH GgHH GgHh ggHH ggHh

gh GgHh Gghh ggHh gghh

Green colored - 9

Yellow colored - 3

White colored- 4

A man with type AB blood is married to a woman with type O blood. they have two natural children and one adopted child. Jane has type A blood, Jordan has type B blood and Marlin has type O blood. which child was adopted and how's do you know​

Answers

Answer:

//

Explanation:

Jordan is adopted because if one if your parents has O blood you have O blood

and you cant roulette a blood type and get B

the child with the blood type O is adopted.

Which of Earth's spheres are involved in the water cycle?
A. Hydrosphere, atmosphere, lithosphere, and biosphere
OB. Hydrosphere, atmosphere, and lithosphere only
O C. Hydrosphere, atmosphere, and biosphere only
D. Hydrosphere and atmosphere only

Answers

Answer:

Hydrosphere, atmosphere, and biosphere only

Answer:

the atmosphere and hydrosphere

Explanation:

i did my work

The level of glucose in the bloodstream drops. The person requires glucose in cells to meet the demand for ATP (glucose is broken down to create ATP). The body detects glucose levels with a particular receptor designed for this function. These receptors release hormones, chemical messages that initiate the start of the feedback mechanism. The hormones travel to their target tissue and initiate a corrective response. In this case, the corrective response is the secretion of more glucose into the bloodstream. Does this demonstrate POSITIVE or NEGATIVE FEEDBACK?

Answers

Answer:

Negative feedback.

Explanation:

It is negative feedback because the reactions triggered by low glucose levels are trying to rebalance the glucose concentrations in our body to make it work properly.

In positive feedback, a product will only stimulate more the components that lead to that product to produce more of it, increasing the product's effect and an imbalance.

What types of rocks were used to construct the time scale?

Answers

Answer:

Sedimentary rocks were used to construct the time scale.

Hope it will help :)

What are some common properties that most terriers share?

Answers

Answer:melting point, density, color, hardness, flammability, and reactivity with acid. What are examples of non-characteristic properties? What are two common properties that most terriers share?

Explanation:

How do whales differ from fish
A) whales use blowholes for breathing
B) whales have scales that cover the skin
C) whales develop lungs following metamorphosis
D) whales reproduce through external fertilization

Answers

Whales breathe through lungs, so C they develop lungs.

Answer:

awsner is c, whales develop lungs following metamorphis

Explanation:

5. If you used a Punnett Square to cross "Ee" and "Ee", how many different genotypes
and phenotypes would you get?

Answers

You would get 1 EE, 2 Ee, and 1 ee. Making it 3 different genotypes and 2 different phenotypes

Please answer .Thanks

Answers

Answer:

uh I would bet that it is a non flowering plant

Explanation:

It literally says that on the table

What are 3 beneficial functions of coastal wetlands?

Answers

Answer:

Hope it helps

Explanation:

Wetlands provide many societal benefits: food and habitat for fish and wildlife, including threatened and endangered species; water quality improvement; flood storage; shoreline erosion control; economically beneficial natural products for human use; and opportunities for recreation, education, and research

List the 6 kingdoms of living things, and describe what is found in each kingdom.

Answers

Answer: Archaebacteria, Eubacteria, Protista., Plants,Animals.

Explanation:

The chemical that moves from the axon of one neuron across a gap to the dendrite of
another is a n):
Schwann Cell
Vitamin A
Node of Ranvier
Neurotransmitter

Answers

Answer:

Schwann Cell

Explanation:

what is the job for tRNA ?

a. to transport amino acids to the ribosome for protein synthesis

b. to act as a template for the coding strand of DNA

c. to serve as a temporary copy of the coding strand of DNA

d. to provide the energy needed to power protein synthesis

Answers

Answer:

A

Explanation:

The job of Transfer RNA is to provide amino acids to ribosomes in order to produce proteins for the cell.

What causes the "dead zone" in the Gulf of Mexico each summer?

Answers

A dead zone of oxygen-depleted waters forms every summer in the Gulf of Mexico in response to nutrient runoff from the Mississippi River watershed. ... Nutrient-rich runoff containing nitrogen and phosphorus from agricultural lands and sewage causes the summer dead zone in the Gulf of Mexico.

If an organism inherits 1 dominant allele from one parent and 1 recessive allele from the other parent, what is it called?

Answers

Answer:

heterozygous

Explanation:

An allele is a variant form of a gene. Some genes have a variety of different forms, which are located at the same position, or genetic locus, on a chromosome. Humans are called diploid organisms because they have two alleles at each genetic locus, with one allele inherited from each parent. Each pair of alleles represents the genotype of a specific gene. Genotypes are described  as heterozygous if the two alleles differ.

define atomic number and mass number – describe how they differ

Answers

Answer:The major difference between atomic number and mass number is that the atomic number states the number of protons present in an atom whereas, the mass number indicates the total of the number of protons and the number neutrons present in an atom.i) Atomic number is the total number of protons present in the nucleus of an atom. It is also equal to the number of electrons for a neutral atom. Example, atomic number of sodium is 11. ii) Mass number is the number of protons and neutrons in the nucleus taken together. For example, mass number of sodium is 23 g/mol.

hope this helps have a great night❤️❤️❤️❤️

Explanation:

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