Answer:
Yes it does affect humans.
Explanation:
Natural selection acts on the phenotype, but evolution is a change in the frequency of alleles in a population over time, a change in genotype. So natural selection acts on phenotype, but it is the connection to genotype that makes it the mechanism of evolution. Many traits vary among different members of a population of humans and animals, from body size to hair color, and those differences are often linked to differences in genes. Natural selection occurs when some of those traits help some individuals survive and reproduce more than others. In scientific terms, these hazards are referred to as selection pressures. They put pressure on us to adapt in order to survive the environment we are in and reproduce. It is selection pressure that drives natural selection "survival of the fittest" and it is how we evolved into the species we are today.
which of the following statements about extinction is true?
a) extinction is the ultimate fate of all species
b) extinction can occur in small areas
c) extinction can be caused by the introduction of exotic species
d) all of the above
Answer:
The answer is D. ALL OF THE ABOVE on PEX
Explanation:
i just took the quiz!
what do plants produce using nitrogen?
Answer: Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide (i.e., photosynthesis). It is also a major component of amino acids, the building blocks of proteins.
Explanation:
Please needed as soon as Possible thank you!
Answer:
The answer is B. Stratum Basale
what does federal law require of employers in regard to the hospital B vaccine
Answer:
Health care workers who work with blood or other bodily secretions which may carry the HBV virus must receive a free HBV vaccination.
Write how many atoms of each element there are in 3H3CN3Br2.
Describe at least three types of weather data that is collected, the instruments used to collect the data, and in what units they are measured.
Answer:
Thermometers measure temperature, radar measures rain or snow locations and movements, barometers measure air pressure, rain gauges measure amounts of rain, wind vanes measure wind direction, anemometers measure wind speed, transmissometers measure visibility, and hygrometers measure humidity.
Which of the folllowing is true about the efficiency of the energy conversions in terms of the overall energy available to human shown in these diagrams
Answer:
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900.j of work are done by a light bulb in 15.0 s. What is the power of the light bulb?
Why is the sickle cell allele still common in tropical regions?
A reflex response to excessive pain or heat is first processed through the brain.
True
False
Answer:
False
Explanation:
The above statement is false
False because reflexes and snap reactions are generally bounced back directly from the spinal cord to save time. An example could be touching something hot because you react and move away instantly rather than your body burning for a second while the brain processes the information.
Hope I helped you.
Lack of which factor would be most likely to turn an alien species into an invasive species?
mates
suitable food
suitable habitat
predators
Answer:
predators
Explanation:
The correct answer is predators. An alien species that finds plenty of food and suitable habitat in its new home is usually able to find mates and reproduce well. But the competing species may become endangered or even extinct, because the alien (now invasive) species has no natural predators in the new environment, and its population can therefore grow without limits.
Answer: predators
Explanation:
Which of the five stages of respiration takes place at the alveoli?
Answer:
External respiration is the exchange of gases with the external environment, and occurs in the alveoli of the lungs.
8. There can only be one logical inference for any given observation. (T/ F)
how does a banana become a banana?
There is a seed in the banana and then the seed grows into a tree and produces more banana
Is the Sun a planet? Why or why not? (3-4 sentences)
Answer:
No
Explanation:
The Sun is a star there are lots of stars,but the Sun is the closest one to Earth.It made from gases and it always burning
Planets are:Mercury, Venus, Earth, Mars, Jupiter, Saturn, and Uranus
related to HELP part c number 1
Answer:
Due to suitable environment of the equator.
Explanation:
Latitude is abiotic factor that has a great impact on the occurrence of fish species as we can see in the graph, the fish species increases as we go towards equator whereas decreases when we go away from the equator. This is because the climatic condition and temperature of water at the equator is suitable and warm so this suitable environment attracts more species to lives there.
what two types of nutrient are our main sources of energy ?
Explanation:
The nutrients that provide energy are commonly referred to as micronutrients (carbohydrates, lipids,and proteins). carbohydrates and proteins provide a similar amount of energy per gram of food.
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If the anticodon of a molecule of tRNA has the sequence GAU, what was the original DNA sequence?
Answer:it’s not CUA
Explanation:
pretend that you touch a hot pan on the stove, and you immedentially pull your hand away without thinking about it. in this scenatrio, what is the stimulus and the response?
Answer:
The stimulus the thing that stimulates you is the hot pan because you were du.mb and decided to touch the hot pan. The response is you yanking your hand away from the heat because for some reason you thought touching a hot pan was a good idea.
Explanation:
Dude seriously, be conscious.
Which statement correctly compares electric charge with electric current?
Answer:
voltage causes electric charges to move from higher to lower potential.
Explanation:
While looking at a cell under a microscope you notice there is no nucleus and the
chromosomes are double stranded (they have 2 sister chromatids). What phase of mitosis is
the cell probably in?
Answer:
This is the Prophase. Mitotic Prophase,
Explanation:
The process cell division where the cells divides two similar daughter cells(2n) is called mitosis. Therefore it is called a multiplication division because two daughter cells are form from a single the mother cells. Each of the daughter cells can also undergo Futher divisions.
It is the second stage fist mitotic cells division after the first phase called Interphase.
In this stage, the nuclear membrane disappear, nucleolus disintegrate and the nucleus disappeared This is followed by the constriction of the chromosome to sister chromatids.
The constricted nuclear membrane leads to the releases of the chromatids This is followed by the formation of the spindles fibers which are needed for the movement of chromosome for cross over.
other phases are Interphase Prophase Metaphase Anaphase Telephase(IPMAT)
What is the ingroup in a cladogram?
Answer:
•Ingroup in biology is a group of taxa that is considered in determining evolutionary relationships. The taxa in an ingroup are closely related. In fact, they are sister groups, and they share a common ancestor. Therefore, taxa in an ingroup are descendants that split from the same node in the cladogram.
Explanation:
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2. "Natural selection is usually thought of as an agent of change in populations, but it can also act to maintain the status quo."
In a short, written response, analyze and evaluate this statement. Include the range of responses of a population to changes in the environment, such as differential reproductive success, the adaptation and development of diversity in and among species, and the change in populations.
Answer:
Those organisms survive and maintain its population who are chosen by natural selection.
Explanation:
This statement means that when the population experiences a new set of environmental conditions, two things are happened i. e. the population either adjusts through natural selection or becomes extinct. The fossil of dinosaur indicates that extinction occur due to changed in the environment. If the population made changes in itself and adapt the environment then the organism survive otherwise extinction occur.
If a cell contains chloroplasts, a cell wall and a large central vacuole, it must be a(n) ___________.
Answer:
Plant cell
Explanation:
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A domestic cat has 38 chromosomes in its skin cells, while a dog has 78 chromosomes. How does this fact help to explain why dogs and cats cannot interbreed?
Answer:
The sex cells could not easily combine to form the body cells of an offspring because of the different chromosome number.
Explanation:
The fact that dog and cats cannot be interbreed because there is difference in the no. of chromosome.
What is interbreeding?
The act of mixing different species or varieties of animals or plants and thus to produce hybrids is called interbreeding.
Dogs have 78 no of chromosome which is similar to the lions and tigers but there is difference in the no of chromosomes which cannot produce viable offspring.
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A tall pea plant with red flowers has the genotype
TtRr. This plant is crossed with another tall pea plant
with white flowers, having the genotype Ttrr.
Gametes TR Tr IR tr
What is the probability of getting dwarf plants with red
flowers in the F1 progeny?
Answer:
2/8
Explanation:
I did this before
1/8 or 12.5% is the probability of getting dwarf plants with red flowers in the F1 progeny.
What is a dihybrid cross?Dihybrid is defined as the cross observed between two characters, in which two different gene is responsible for the two particular characters.
In the given question plant height and flower color are observed. A tall pea plant with red flowers (TtRr) is crossed with another tall pea plant with white flowers (Ttrr).
Gametes: TtRr - TR, Tr, tR, and tr
Ttrr - Tr, Tr, tr, and Tr
Genotypes: Tall, Red (T_R_) = 6
Tall, white (T_rr) = 6
Dwarf, red (ttR_) = 2
Dwarf, white (ttrr) = 2
Therefore, the probability of getting dwarf plants with red flowers in the F1 progeny is 1/8 or 12.5%.
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WILL GIVE BRAINLIEST I PROMISE.
Match each word or phrase to the best definition.
1.the breakdown of rock or soil
2.processes that build up Earth's
crust, create new landforms, or
add sediment to existing areas
of land
3.a visual model of the elevation
of geologic features on Earth
4.the transport of weathered
materials from one place to
another by natural forces
5.natural forces lay eroded
sediment down in new places
6. processes that break down
rocks and landforms and carry
sediment away
how does the structural adaptation of seeds help them survive
Answer:
Explanation:
A seed is a plant embryo wrapped in a protective covering. A fruit is the ripened ovary of a plant which contains one or more seeds.
Most plants are rooted in place, which makes dispersing their fruits and seeds particularly important. Seeds that are spread far from the parent plant avoid competition with their relatives for resources and have the opportunity to colonize new areas. Both fruits and seeds have a variety of adaptations for different types of dispersal.
Examples of the some common types of dispersal follow.
Wind
<-- Left : These seeds are transported by air currents. Small fruit or seeds with fine fluff can be carried high up into the air. Herbaceous plants of open areas (like dandelions, cattails, and milkweeds) often have this adaptation. Their seeds float up over neighboring plants even if the parent is growing low to the ground.
Right -->: The fruit of maple trees are also adapted to catch the wind. Many trees (like ashes and sweetgums) have winged fruits or seeds which drop from the tree and are caught by the wind as they fall.
Water
<-- Left : Sea bean seeds are adapted for dispersal by ocean currents. Sea bean vines grow along rivers and coasts. When the pods ripen, they split open and the seeds drop into the water. The beans have a thick seed coat to keep the salt-water out, and have internal structures which make them buoyant enough to float. They can drift for hundreds of miles before washing up onto land.
Coconuts (which are single-seeded fruits) are also adapted for water dispersal. Like sea beans, they have a thick shell to prevent the salt-water from damaging the seed, and the buoyant hull keeps the nut floating.
Animals: internal transport
<-- Left : Brightly colored fruits advertise for dispersers. They are highly visible to birds, promising a nutritious (and often sugary) reward. The seeds are tough and usually undamaged when eaten. They are dispersed when the bird makes a rest stop.
Right -->: Immature seeds in unripe fruit would die if eaten. The green of young fruit hides them among leaves. Unripe fruit are sour or bitter to discourage animals that do find them. Green fruit cling tightly to the plant, making it hard for animals to remove them.
Animals: external transport
<-- Left: Cockle burrs are dry fruit adapted for animal dispersal. The hooked spines catch on the hair (or socks) of passing animals. Dispersal is complete when the animal picks off the offending burr, hopefully dropping it in a new location suitable for growth.
Right -->: Fruit of the unicorn plant have an unusual adaptation for transport. As grazing deer or antelope walk over them, the spines catch around the animals' feet. When the animal finally gets annoyed and shakes the fruit off, dispersal is complete.
how much stronger is an earthquake of magnitude 7, than an earthquake of magnitude 6?
Answer:
A magnitude of 7 is 32 times more stronger than a magnitude of 6
Explanation:
Assume the first DNA codon for the insulin gene reads TAG. Using your codon chart, look up the amino acid that is coded for by this codon.
Answer:
Isoleucine
Explanation: