Answer:
The xylem is one of the two types of tissue transported from the vascular plants, the other being the phloem.
Answer:
Xylem and phloem Plants have tissues to transport water, nutrients and minerals. Xylem transports water and mineral salts from the roots up to other parts of the plant, while phloem transports sucrose and amino acids between the leaves and other parts of the plant. Xylem and phloem in the center of the plant root
Explanation:
Hope this helps!!
Please help!!!! 20 points
Answer:
Producers: Leaves and the other plant thing (i don't know the name of it)
First-level consumers: Squirrel, grasshopper, rabbit, rat
Second-level consumers: Frog, rat
Third-level consumers: Fox, owl, snake
Herbivores: Grasshopper, rabbit, squirrel
Carnivores: Frog, fox, snake, owl
Omnivores: Rat
10. What is an entomologist?
Answer:
An entomologist is a person who studies, or is an expert in the branch of zoology. (A branch in zoology concerned with insects.)
Explanation:
There are thirteen species of finch found on the Galapagos Islands. These finches are commonly referred to as “Darwin’s Finches” and are a common example of natural selection and adaptive radiation.
Which question would MOST help a scientist determine the level of biodiversity, that exists among the thirteen species of finch on the Galapagos Islands?
Question 6 options:
What is the most common beak color among the finches?
How many finches are more than five years old?
Which species of finch has the greatest average mass?
What variation exists between the species for traits like beak size and shape?
Answer:
What variation exists between the species for traits like beak size and shape?
Explanation:
If the question is looking for biodiversity, the answer would include variation.
In the fantastic Jillalope, the offspring of a true-breeding black parent and a true-breeding white parent all appear gray. When these gray offspring are crossed among themselves, their offspring always appear in a ratio of 1 black : 2 gray : 1 white. Upon close examination of the coats with a magnifier, each hair of a gray animal has closely-spaced alternating black spots and white spots, but no gray spots. What is the mode of inheritance
Answer:
Co-dominance
Explanation:
Due to technical problems, you will find the complete explanation in the attached files
Which of the following is an example of how climate change has led to loss of biodiversity?
Select one:
A Lizard species are moving to higher elevations to seek cooler temperatures.
B Rising temperatures allow Arctic mosquitos to grow faster and emerge earlier.
C Populations of octopus, squid, and other cephalopods are increasing due to their adaptability to warmer ocean temperatures.
D Rising sea temperatures have led to a decline in phytoplankton populations.
. Students decide to remove the litter from an abandoned park and plant trees. Which of the following observations provides the best evidence that the action of the students has had a positive effect on the health of the park ecosystem?
A. The number of human visitors decreases.
B.The level of yearly precipitation increases.
C.The number and diversity of animals increases.
D.The average daily high temperature decreases.
Answer:
c
Explanation:
What are some inherent traits of a lion
Answer the following questions:
1. How does motion help us in our daily life?
2. How would you be able to help those people who cannot move due to
paralysis
Answer:
1. Lack of motion is death. Movement is a vital nutrient to your body, just as much as food, water, and oxygen.
2. Potassium supplements can prevent attacks of paralysis.
Explanation:
Which three organ systems work together to take in oxygen and other
nutrients and deliver them to an animal's body cells?
A. Respiratory, because it takes in gases from the external
environment
B. Circulatory, because blood absorbs nutrients and carries them to
other cells
c. Nervous, because it controls the body functions and responses to
stimuli
D. Digestive, because it breaks down the nutrients in food into
substances that can be used by cells
Answer:A, B and D
Explanation:Respiratory takes in oxygen and digestive absorbs nutrients from the food while the circulatory deliver those through the entire body.
A B D im on the exam
Leaves of a healthy potted plant were coated with Vaseline to block stomata. Will this plant remain healthy for long? State three reasons for your answer.
➜ If waxy coating is made on the surface of leaf, loss of water in the form of water vapour does not take place. Even the gaseous exchange will not take place. So, photosynthesis will either be reduced or will not take place.
The plant will not remain healthy for long because:
[i] Exchange of gases will not take place.
[ii] Photosynthesis will either be reduced or will not take place due to lack of CO2.
[iii] Transpiration will not take place, so there will be no mechanism of cooling in hot weather.
Which of the following is defined as the assurance of nutritional quality to ensure productie oliopinda
fetal programming
prenatal growth process
differentiation
genetic reassortment
Answer:
prenatal growth process
how does the structure of simple squamous cells allow it does to its function?
Answer:
Structure of the simple squamous epithelium
The cells appear like scales that provide a smooth low-friction surface over which fluids can move quickly. Membrane carrier proteins are found in this layer that function to facilitate the movement of ions, gases, small molecules, or water through the cells.
We have 13 different clotting factor proteins in our blood. Do you think hemophilia is controlled by one or multiple genes?
Hemophilia A and hemophilia B are inherited in an X-linked recessive pattern . The genes associated with these conditions are located on the X chromosome, which is one of the two sex chromosomes . In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. Basically it's whatever you believe it is.
Seeds inside the closed vessel does not give new seeding ,why?
Answer:
It is not able to produce a new seedling as it requires sunlight and air to prepare its own food and the process of photosynthesis does not occur. So, the seed inside the closed vessel does not give new seedling.
Explanation:
Answer:
It is not able to produce a new seedling because it needs the sun and air to prepare it's own food and the process of photosynthesis does not occurs
Explanation:
See below, b represents
Options
water
glucose
oxygen
CO2
Answer:
CO2
Explanation:
CO2 is needed to produce glucose
It is estimated that the world human population reached 3 billion people in 1959 and 6 billion in 1999. Assuming a carrying capacity of 16 billion humans, write and solve the differential equation for Gompertz growth, and determine what year the population reached 7 billion. Was logistic growth or Gompertz growth more accurate, considering world population reached 7 billion on October 31,2011
Answer:
i ) Gompertz equation :
[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]
ii) The year that population reaches 7 billion is 2013
iii) The logistic growth was more accurate
Explanation:
i) write and solve the differential equation for Gompertz growth
Gompertz equation :
[tex]\frac{dP(t)}{dt} = \alpha In ( \frac{K}{P(t)} )P(t)[/tex]
∝ = growth rate
k ( carrying capacity ) = 16 * 10^9
P(t) = population at time t
ii) Determine what year the population reached 7 billion
The year that population reaches 7 billion is 2013
solution attached below
iii) Determine if logistic growth or Gompertz growth was more accurate considering world population reached 7 billion on October 31,2011
The logistic growth was more accurate because the when Logistic growth model was used, the year in which the population reached 7 billion was 2010 and this value is more closer to 7 billion on October 31 2011 ( given value )
What is biomass burned to produce
Answer:
Burning either fossil fuels or biomass releases carbon dioxide (CO2), a greenhouse gas. However, the plants that are the source of biomass for energy capture almost the same amount of CO2 through photosynthesis while growing as is released when biomass is burned, which can make biomass a carbon-neutral energy source.
Can viruses live through mutation and natural selection
Answer:
sure why not
Explanation:
as the virus mutates, it may increase, or lessen the chance for the virus to survive a battle against its host. like your regular living organisms (though keep in mind viruses are not considered living), some survive and some die due to natural selection and mutation.
Do you think humans would be
as dominant if the dinosaurs
were still present?
Answer:
Probably not, as we might have evolved to become prey instead of predator
Answer:
i dont think so.
Explanation:
the dinosaurs would've already ate us, and crushed the cities. dinosaurs are too dangerous for us. especially the T-rex.
Describe the 6 phases of developing a vaccine
Answer:
Exploratory stage
Pre-clinical stage
Clinical development
Regulatory review and approval
Manufacturing
Quality control
Explanation:
Internet
Explanation:
there are many stages to a vaccine
many come from ... developing symptoms
in which some case can come from
some quality control, pre-clinical control or even exploratory stage
Flowering plants and pollinators, such as bees, have adapted together over time in ways that enhance each other's survival. The bee obtains nectar from the flower How does the flower benefit from this relationship?
O It gains food
O
It is pollinated
O Its seeds are dispersed.
It receives growth hormones
HELP PLEASE!!!
Answer:
it is pollinated
............
Answer: it’s pollinated
Explanation:
i took the test lol
PLEASE HELP ASAP
how does the ribosome read the mRNA?
Answer:
A ribosome is made up of two basic pieces: a large and a small subunit. During translation, the two subunits come together around a mRNA molecule, forming a complete ribosome. The ribosome moves forward on the mRNA, codon by codon, as it is read and translated into a polypeptide (protein chain).
Explanation:
What is an antiviral drug? Why is it different from an antibiotic?
Answer: Unlike most antibiotics, antiviral drugs do not destroy their target pathogen; instead they inhibit its development.
Action Potential: Relative refractory period
In a neuron, there is a period of time called the absolute refractory period where it is impossible for an action potential to
begin. This corresponds to the change in membrane potential from +30 to -70 mV, or the repolarization phase. Towards the
end of the repolarizing phase, there is a relative refractory period where it is difficult, but not impossible, for another action
potential to begin. Using the time slider function, which of the following segments in the neuron would correspond to a
relative refractory period?
A second action potential can be triggered during the relative refractory phase, but it will need a stronger stimulus to do so than the first time. Refractory times are brought on by the inactivation gate of the Na+ channel.
What Action Potential related to Relative refractory period?The axon has a tougher time producing successive action potentials during this time period, which is referred to as the refractory period, as a result of these transient alterations.
As a result, the refractory period restricts the quantity of action potentials that a certain nerve cell can generate in a given amount of action potentials time.
If enough powerful stimuli are applied to the neuron after the absolute refractory time, Na+ channels start to recover from inactivation and the neuron may respond once again by generating action potentials.
Therefore, A stimulus that is stronger than usual is required to generate neuronal activation during the relative refractory period.
Learn more about Action Potential here:
https://brainly.com/question/7277845
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An individual with two different alleles for the same gene is
called
Answer:
an individual with two same alleles genes is called a heterozygous
The University of Illinois has been conducting one of the longest selection experiments, begun in 1896 by C.G. Hopkins. Researchers have been selecting for high corn oil content (as measured in % dry mass). Researchers select those plants with the highest corn oil content, and use only those individuals to seed the next generation. Here is a portion of actual data from their experiment:
1899 mean oil content in entire population: 5.65% dry mass
mean oil content of selected plants: 6.30% dry mass
1900 mean of oil content in entire population: 6.10% dry mass
Calculate the heritability of corn oil content (% dry mass). For full credit, show your work, including any equations used.
Answer:
0.725
Explanation:
This type of question is a concept of Narrow-sense Heritability and Artificial selection used by plant breeds.
So, heritability = R/S
where;
R = response to selection
S = selection differential
S further implies the difference in mean oil content between base population & selected population.
S = 5.65 - 6.30 = 0.65% ( where the negative sign are not regarded)
R implies the difference in mean oil content between the offspring or population after implementation of selection and the base population.
R = 6.10 - 5.65 = 0.45%
∴
Heritability = R/S = 0.45% / 0.6%
= 0.725
Thus; the heritability in the oil content of corn in the given set of population = 0.725.
Caenorhabditis elegans is a species of soil-dwelling nematode (roundworm) that feeds on soil bacteria, including Bacillus thuringiensis.
a. True
b. False
Answer:
b. False
Explanation:
Caenorhabditis elegans is a well-known species which is widely used in genetic experiments (i.e., it is a model organism). C. elegans is a soil nematode that eats bacteria, but its survival depends on the ability to distinguish toxic from non-toxic ones. C. elegans cannot feed Bacillus thuringiensis because this bacterium produces a toxin Bt protein that damages its gut, thereby producing the death of this nematode. Interestingly, it has been proposed that Bt toxin pathways might be exploited for the design of new generation nematicides.
5. Most Sex-linked disorders like hemophilia and colorblindness are located on *
Answer:
Either the X or Y chromosome (the sex chromosomes)
Explanation:
Color blindness, hemophilia and muscular dystrophy are three x-linked phenotypes.
Why is family history thought to be important and a good predictor of an individual’s disease risk factor?
Because family members most closely represent the unique genomic (DNA) and environmental interactions that individuals experience
Because doctors can determine your family’s risk from your ailments
It is important to know family history so that a doctor can issue the right antibiotic to prevent cancer
So that doctors can know how your 1 st line of defense reacts to antibiotics mi
Answer:
The first answer, Because family members most closely represent the unique genomic (DNA) and environmental interactions that individuals experience. Is right
Explanation:
What is a pill bugs habitat
Answer:
The pillbug's main habitat is under mulch, fallen leaves, and rocks. Pillbugs are nocturnal and require humid conditions during the day. Pillbugs are generally found in soil with sowbugs, millipedes, and earthworms. Their preferred soil habitat is composed of organic matter and has a neutral to alkaline pH.