Euglena are unicellular organisms classified into the Kingdom Protista, and the Phylum Euglenophyta. All euglena have chloroplasts and can make their own food by photosynthesis. They are not completely autotrophic though, euglena can also absorb food from their environment; euglena usually live in quiet ponds or puddles.
Euglena move by a flagellum (plural ‚ flagella), which is a long whip-like structure that acts like a little motor. The flagellum is located on the anterior (front) end, and twirls in such a way as to pull the cell through the water. It is attached at an inward pocket called the reservoir. Color the reservoir grey and the flagellum black.
The Euglena is unique in that it is both heterotrophic (must consume food) and autotrophic (can make its own food). Chloroplasts within the euglena trap sunlight that is used for photosynthesis, and can be seen as several rod like structures throughout the cell. Color the chloroplasts green. Euglena also have an eyespot at the anterior end that detects light, it can be seen near the reservoir. This helps the euglena find bright areas to gather sunlight to make their food. Color the eyespot red.Euglena can also gain nutrients by absorbing them across their cell membrane, hence they become heterotrophic when light is not available, and they cannot photosynthesize.
The euglena has a stiff pellicle outside the cell membrane that helps it keep its shape, though the pellicle is somewhat flexible and some euglena can be observed scrunching up and moving in an inchworm type fashion. Color the pellicle blue.
In the center of the cell is the nucleus, which contains the cell's DNA and controls the cell's activities. The nucleolus can be seen within the nucleus. Color the nucleus purple, and the nucleolus pink.
The interior of the cell contains a jelly-like fluid substance called cytoplasm. Color the cytoplasm light yellow. Toward the posterior of the cell is a star-like structure: the contractile vacuole. This organelle helps the cell remove excess water, and without it the euglena could take in some much water due to osmosis that the cell would explode. Color the contractile vacuole orange.
Explanation:
Answer:
im pretty sure the cell membrane just protects the Euglena as a whole and the rest of the cells inside it.
Explanation:
Use your codon chart and tell me what amino acids are coded for by the mRNA sequence AUG CGG UCC GGA
Answer:
Methionine, arginine, serine, glycine
Explanation:
Use a codon chart (attached below) to determine what amino acids are coded for by the strand of mRNA. Remember that codons are groups of three nucleotides in mRNA. So, read the nucleotides in groups of three (just as how they are separated by spaces) and from left to right.
To use this codon chart, identify the first letter representing the first nucleotide in the codon. Then, find the matching letter that's one of the four biggest letters in the middle of the chart. Identify the second letter, then find the matching medium letter in the chart, staying within the section of the first letter as indicated by the lines, and do the same process with the third. Repeat for each codon.
Thus, with this mRNA strand, the amino acids will be methionine, arginine, serine, glycine.
This graph shows the result of a test designed to measure the stopping power of a certain brand of brake pads.
During which time period is the automobile slowing most rapidly?
A)
Between 0 and 1 seconds.
B)
Between 1 and 2 seconds.
Between 2 and 3 seconds.
D)
Between 3 and 4 seconds.
Answer:
i donnnnnnnnnnnnnnntttttttt knowwwwwwwwwwwwwwww
Explanation:
i really dont know im just a 12 year old kid struggling with math
Give an example of interspecific competition.
Question 20
0.5 pts
Which system is described below?
Function: Regulates body functions by chemicals (hormones)
Major Organs: Pituitary gland, Thyroid gland, Adrenal gland, Thymus, Pancreas
O Endocrine system
O Integumentary system
O Respiratory system
O Urinary system
Answer:
Endocrine system
Which of the following will most likely decrease genetic diversity?
А increased reproduction
B selective breeding
C mutations
D immigration
Selective breeding dangers reduced genetic diversity can result in certain insects or diseases attacking, which could be quite devastating. Thus, option B is correct.
What is the cause of selective breeding in genetic diversity?Selective breeding can contribute to a large reduction in the genetic diversity of farmed populations, endangering long-term evolutionary progress and limiting populations' ability to adjust to environmental changes.
Unknowingly selecting uncommon illness genes as part of a desirable characteristic might cause difficulties with particular organisms, such as the high prevalence of deafness in Dalmatian dogs.
Genetic diversity is typically reduced by selective breeding, since only a few individuals are employed to produce enormous numbers of offspring. The population's survivability may be impacted by this.
Therefore, selective breeding will most likely decrease genetic diversity.
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What is an observational study? How is it different from a controlled experiment?
Answer:
Observational study is when you observe your subject and take more notes rather that writing down quantitative data. Meanwhile, a controlled experiment is more quantitative.
Explanation:
The Layers of the Earth video compared the layers of the earth with what type of food?
D.Malted Milk Ball
C.Avocado
A.Hard Boiled Egg
B.Coconut
A plant biologist discovers a new species of plant in the ashes of a recent forest fire along the sides of a steep mountain range. It is fall, and temperatures are dropping below freezing. The biologist cannot stay in the field to observe the plant. What can he infer about the plant’s reproductive strategy, based on his recent observations?
Answer:
Based on the observations, the plant likely reproduces by dropping a pod of some sort (such as a cone) and the heat of the fire allows the pod to open up and drop the seeds. This is called pyrophytic reproduction.
Explanation:
The plant will produce cones because cones allow for seed dispersal during all seasons. Hence, option C is correct.
What are cones in gymnosperms?A cone is a mass of scales or bracts that is typically ovate in shape and that houses the reproductive organs of several non-flowering plants.
All gymnosperms, some club mosses, and horsetails have the cone, which distinguishes them from pines and other conifers. Gymnosperms generate huge female cones and little male cones, which are two separate types of cones.
Pollen is produced by male cones and is then wind-transported to female cones. The female cones produce seeds after the male gametes from the pollen fertilize the female gametes, which are subsequently dispersed from the plant by wind or animals. Hence, option C is correct.
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Your question is incomplete, but most probably your full question was,
A plant biologist discovers a new species of plant in the ashes of a recent forest fire along the sides of a steep mountain range. It is fall, and temperatures are dropping below freezing. The biologist cannot stay in the field to observe the plant What can he infer about the plant's reproductive strategy, based on his recent observations?
A. The plant will produce flowers because at this altitude there is sufficient sunlight.
B. The plant will produce cones because cones will mature into adult plants more rapidly.
C. The plant will produce cones because cones allow for seed dispersal during all seasons.
D. The plant will produce flowers because flowers can protect the seeds from extreme conditions.
PLEASE HELP
how does building a road, affect tourist?
is it good or bad? and why
i need VERY SHORT answer
Answer:
It's good.
It's easier to travel on a road than on rough dirt or grass etc.
Edit:
They would be more likely to go to your place and they would feel safer and they would invite their friends if they really like it.
(Sorry for not adding this before)
How to write a discussion on macromolecules in a lab report
Which statement explains why the structure of sickle cells differs from normal red blood cells?
A
The gene mutation affects protein synthesis.
B
The gene mutation prohibits DNA replication.
C
The gene mutation inhibits the cell’s ability to produce tRNA.
D
The gene mutation affects the cell’s ability to produce ATP.
Answer:
a
Explanation:
The structure of sickle cells differs from normal RBCs because of the gene mutation that affect the protein structure.
Sickle Cells:
These cells look like a crescent moon. They are unable to transport oxygen. This cause anemia in the patient.
It is an inherited disorder in which point mutation in the lead to the different protein structure. This results in the sickled RBCs.
Normal blood cells are round in shape and able to transport oxygen.
Therefore, the structure of sickle cells differs from normal RBCs because of the gene mutation that affect the protein structure.
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Alleles: H=hearing h=deaf
Genotypes/Phenotypes: HH=hearing Hh=hearing (h carrier). hh=deaf
Below is how you would set up this problem: Fill out a Punnett square to help you answer the question.
H h
H __ __
h __ __
What percentage of offspring would be deaf?
25%
50%
75%
100%
Answer:
3/4 (3 out of 4) of the genotypes are deaf. 3/4 is also equal to 75%. So 75% of the offspring produced will be deaf.
Explanation:
The way the punnet squares work is the top allele on the left combines with the left allele on the top, the top allele on the left is combined with the top allele on the right, the bottom allele on the left is combined with the top allele on the left, the bottom allele on the left is combined with the top allele on the right. I hope this makes sense
1. Lymph fluid contains all but
a, red blood cells
b. hormones
c. digested nutrients
d. salts
The model below shows the genetic material of a cell during a phase of mitosis.
Which of these models shows the same cell in the phase immediately before this phase?
Answer:C
Explanation:
Can a male be a carrier for a sex-linked disease?
Answer:
yEs
Explanation:
cUz
Answer:
No i am pretty sure its only through male
Explanation:
Explain the strengths and weaknesses of Lamarck's theory of evolution.
There is no experimental proof of the lamarckism. New organs are not formed in organisms by their wish or requirement. 3.It is not necessary that an the acquired characters transmit into new
Answer:
Weaknesses are traits may stay around for longer that what their needed and Strengths are we adapt to our needs.
Explanation:
Lamarckism, a theory of evolution based on the principle that physical changes in organisms during their lifetime—such as greater development of an organ or a part through increased use—could be transmitted to their offspring.
I took the quiz and said this, I got it it right!
What is one physical adaptation of sunflowers?????????
Answer:
Sunflowers require full sun exposure, they are heliotropic, which means that the movement of the flower is towards the direction of the sun.
Explain the difference between independent variables, dependent variables, and control variables.
Answer:
Independent: Purposely altered
Dependent: Changes with respect to the independent being altered
Controlled: Never changes
Explanation:
An independent variable is a variable in which does not rely on other pieces/variables of an experiment to assume a value. In other words, it does not change when other variables change. However, it can be changed intentionally by the scientist.
A dependent variable is a variable in which its change in value relies on other pieces/variables of an experiment to assume a value. So, if the indeoendent variable is changed, the dependent variable will change as well. The opposite is not true though - if the dependent variable changes (for whatever reason), the independent variable hasn't necessarily been changed.
A controlled variable is a variable that stays CONSTANT throughout an experiment. It is never changed, and nothing will change it. An example of a control variable is the number of participants in a study: no more participants are being added, and no participants are being removed. The number of participants remains STATIC throughout the study.
The overall chemical equation that describes photosynthesis is shown below. 6CO2 + 6H20 - C6H12O6 + 602 During photosynthesis, what best describes the role of the compound with the chemical formula C6H120$? A. a product that is not useful because of its low-energy chemical bonds B. a product that is useful because of its high-energy chemical bonds C. a reactant that is useful because of its high-energy chemical bonds D. either a product or a reactant, depending on whether the cell needs to store energy or release energy
Answer:d
Explanation:
Because it can be stored or released
*****
3
To Tºp
6) rur and Ynz
GO AWAY!!!!!!!!!!!!!
i dont understand this i need help
NEED HELP!!! WILL GIVE BRAINLIEST!! <3
Answer:
pollution
Explanation:
i guess I can only think of one
what is the molarity
Answer:
Hope its help you
if wrong then sry
Answer:
Explanation:
the number of moles of solute per liter of solution. molar concentration
Molarity (M) is the amount of a substance in a certain volume of solution. Molarity is defined as the moles of a solute per liters of a solution. Molarity is also known as the molar concentration of a solution. Explanation: To get the molarity, you divide the moles of solute by the liters of solution. Molarity=moles of solute liters of solution. For example, a 0.25 mol/L NaOH solution contains 0.25 mol of sodium hydroxide in every litre of solution.
3 type Leaves! DESPREATE HELP
make sure to say what type of tree they come from (instructions from teacher cant be from a a bush ONLY TREE)
explain the shape the margin and the venation
name 3! if correct ill give brainily thing a thanks and 5 stars!
Answer:
Birch tree leaves look like scratchy raindrops, like someone tore tiny pieces (Serrated) from them. The venation looks like a tree, a bunch of veins duplicating from only 1 .
Some oak tree leaves have serrated leaves or are completely smooth. Their venation look Dichotomous.
Pine tree leaves look undulate and the venation is pinnate.
Why would it not make sense for the cell to wait to combine Okazaki fragments into one continuous lagging strand until the entire DNA molecule has been replicated
Answer:
Okazaki fragments are short DNA nucleotides sequences that are formed discontinuously and then combine into one continuous lagging strand with the help of DNA ligase, the endonuclease, and polymerase. It takes place before the entire DNA molecule has been replicated.
If the cell waited to combine Okazaki fragments until the entire DNA molecule had been replicated then the newly synthesized lagging strand that are still Okazaki fragments might already be packaged and inaccessible to the all essential enzymes that are ligase, polymerase, and endonuclease that help to generate a continuous leading strand.
Based on the chart, Which system interactions are dependent on the plant's ability to respond to the direction of
light?
A Option 1
B Option 2
C Option 3
D Option 4
What is the scientific name for a Burchell’s zebra?
Answer:
Equus quagga
Explanation:
I hope this helps!!
Have a great day!
-jmora273
P.S Remember the Name!!!
All organisms have names that
include
class and order
Family and location
order and family
genus and species
HELP ILL MARK BRAINLIEST!!!
Scientists studying a population of fruit flies observe that a small percentage of the population mates in the morning while the rest of the population mates at night. Scientists predict that over time the population that mates in the morning and the populations that mates at night will become different species. Which of the following best supports the scientists prediction that speciation will occur in the fruit fly population?
a. There will be fewer offspring produced in the population of fruit flies that mates in the morning than in the population that mates at night.
b. There will be structural differences in the reproductive organs of the fruit flies in the populations that mates in the morning and those of the fruit flies in the population that mates at night.
c. There will be increasing geographic isolation between the population of fruit flies that mates in the morning and the population of fruit flies that mates at night.
d. There will be an accumulation of genetic differences between the population of fruit flies that mates in the morning and the population of fruit flies that mates at night.
Answer:
B: There will be structural differences in the reproductive organs of the fruit flies in the populations that mates in the morning and those of the fruit flies in the population that mates at night.
Explanation: I just finished the quiz!
13.1: Consider four different cellular systems that share the following characteristics. The frequency bands are 825 to 845 MHz for mobile unit transmission and 870 to 890 MHz for base station transmission. A duplex circuit consists of one 30-kHz channel in each direction. The systems are distinguished by the reuse factor, which is 4, 7, 12, and 19, respectively. a. Suppose that in each of the systems, the cluster of cells (4, 7, 12, 19) is duplicated 16 times. Find the number of simultaneous communications that can be supported by each system. (20MHz / 30kHz) * 16
Answer:
The correct answer is - 10.6666 channels.
Explanation:
Given:
numbers of clusters duplicated = 16 times
The frequency bands for mobile unit transmission are - 825 to 845 MHz
The frequency bands for base station transmission = 870 to 890 MHz
The required bandwidth for each one-way direction of channels = 30 kHz
Formula:
the number of simultaneous communications that can be supported by each system [tex]k_{sys}[/tex] = [tex]MB_{CL}[/tex]/[tex]b_{ch}[/tex]
Solution:
The required bandwidth for each two-way direction of channels = 2 × 30 kHz
then, according to the formula the number of simultaneous communications that can be supported by each system
[tex]k_{sys}[/tex] = [tex]MB_{CL}[/tex]/[tex]b_{ch}[/tex]
k_{sys} = 16×40/60
[b_{ch} = (845-825) + (890-870) = 20+20=40)]
= 10.6666.