Answer:
Cheek cells are eukaryotic cells (cells that contain a nucleus and other organelles within enclosed in a membrane) that are easily shed from the mouth lining. It's therefore easy to obtain them for observation.
Which of the following statement is true about fossil ?
Answer:
there are no statements...
Explanation:
Answer:
Explanation:The deeper you go into the Earth the older the fossils will be. So, in the diagram you have provided we see that fossil #5 is the oldest and fossil #2 is the youngest.
The order of age goes like this (from youngest to oldest):
1. Fossil #2
2. Fossil #1
3. Fossil #4
4. Fossil #3
5. Fossil #5
Therefore, the only correct answer would be that fossil #4 is younger than fossil #3.
Conduction can only occur between two objects when –
Answer:
Conduction can only occur between two objects when -
one object is less dense than the other. both objects are in physical contact with each other.
Can you please help me thanks you
Answer:
1. I can't tell exactly, diagram isn't clear. But it cannot be 'glycolysis' or 'dark reactions'. 2. B 3. A 4. B
Explanation:
Which of the following describes a state of equilibrium?
Answer:
the condition of a system when neither its state of motion nor its internal energy state tends to change with time.
or b partially
A cricket has 22 chromosomes in each body cell (somatic). How many chromosomes are in each sex cell (egg or sperm) of a cricket?
Answer:
How many of these chromosomes will be found in an egg cell? All 46 chromosomes. No, sex cells have a half set of chromosomes. 23, one from each pair.
Explanation:
Why is it so important for us to decrease our use of fossil fuels?
A. The combustion of fossil fuels are causing a hole in the Ozone layer
B. The combustion of fossil fuels leads to an increase in atmospheric CO2 which leads to global climate change
C. The combustion of fossil fuels help us meet our energy demands, so it is not that important that we switch to alternatives.
D. Fossil Fuels do not harm the environment, but we are running out of them so we need alternatives.
help me please please
Answer: it
Explanation: I know
Answer:
B.
Explanation:
Fossil fuels definitely harm the environment, and their supply is depleting. So that takes out answers C and D, leaving A and B. The main cause of ozone depletion and the ozone hole is manufactured chemicals being released into the air. While CO2 from fossil fuels does have an effect on worsening the hole, it has a much higher effect on global climate change.
1pt Place the following steps in the correct order:
1. Sperm nuclear envelope breaks down
2. Genomes blend to form a diploid cell
3. Decondensation occurs
4. Sperm head penetrates egg cytoplasm.
Answer:
The delivery of the paternal genome to the egg is a primary goal of fertilization. In preparation for this step, the nucleus of the developing spermatozoon undergoes extensive morphological and biochemical transformations during spermatogenesis to yield a tightly compacted sperm nucleus. These modifications are essentially reversed during fertilization. As a result, the incorporated sperm nucleus undergoes many steps in the egg cytoplasm as it develops into a male pronucleus. The sperm nucleus (1) loses its nuclear envelope, (2) undergoes nucleoprotein remodeling, (3) decondenses and increases in size, (4) becomes more spherical, (5) acquires a new nuclear envelope, and (6) becomes functionally competent to synthesize DNA and RNA. These changes are coordinate with meiotic processing of the maternal chromatin, and often result in behaviors asynchronous with the maternal chromatin. For example, in eggs fertilized during meiosis, the sperm nucleus decondenses while the maternal chromatin remains condensed. A model is presented that suggests some reasons why this puzzling behavior exists. Defects in any of the processes attending male pronuclear development often result in infertility. New assisted reproductive technologies have been developed that ensure delivery of the sperm nucleus to the egg cytoplasm so that a healthy embryo is produced. An emerging challenge is to further characterize the molecular mechanisms that control sperm nuclear transformations and link these to causes of human infertility. Further understanding of this basic process promises to revolutionize our understanding of the mystery of the beginning of new life.
Explanation:
The delivery of the paternal genome to the egg is a primary goal of fertilization. In preparation for this step, the nucleus of the developing spermatozoon undergoes extensive morphological and biochemical transformations during spermatogenesis to yield a tightly compacted sperm nucleus. These modifications are essentially reversed during fertilization. As a result, the incorporated sperm nucleus undergoes many steps in the egg cytoplasm as it develops into a male pronucleus.
The change in leaf color on these trees is one way the trees maintain what
The structure labeled as x is the ____ so the cell in the image is a ____ the structure labeled as w is the ______ so the cell in the image is a ____
Answer:1. nucleus 2.eukaryotic cell 3.chloroplast 4.plant cell hope this helps
Explanation: p.s the person above did not not know any of the answers
Terrence likes to eat morel mushrooms, which are native to Georgia. How do the kingdoms to which humans and morels belong DIFFER? How are they SIMILAR?
Answer:
Mushrooms are in kingdom Fungi and humans are in kingdom Animalia
Explanation:
These two kingdoms are similar in that they are both in Domain Eukarya, meaning they have eukaryotic cells (have a nucleus, membrane bound organelles, are relatively large and organized). Both are also heterotrophic, meaning they eat other organisms to get energy. They are different in that fungi cells have cell walls made of chitin while animals do not have cell walls. Fungi tend to live pretty sedentary lives, and while that is true for some animals, that is not true of most. Fungi are also decomposers while animals are consumers.
Oil is primarily used for...
A. Cooking/Home uses
B. Electricity
C. Transportation
D. Industrial uses
help me please please
Answer:
A
Explanation:
How does an amoeba breathe
Answer:
Amoebas have a semirigid layer of ectoplasm which absorbs oxygen from the surrounding water and eliminates carbon dioxide in a form of respiration.
Explanation:
hope this helps
PLEASE I NEED THIS I WILL MARK BRAINLIEST AND GIVE YOU 50 POINTS
Answer:
Du kannst ich bekomme nur die Kerze und ich werde dir die Kerze besorgen und ich spiele sein sein und und werde
Which nitrogenous base would pair with adenine during DNA replication?
A
O cytosine
<
B
O guanine
C
Othymine
D
ouracil
The nitrogenous base would pair with adenine during DNA replication is othymine. Thus, option C is correct.
What are nitrogenous base?
Replication relies on complementary base pairing, that is the principle explained by Chargaff's rules and adenine (A) always bonds with thymine (T) and cytosine (C) always bonds with guanine (G). 18% became cytosine pairs with G. A pairs with T. T and C are not complementary base pairs, but we know that if molecules consists of 32% T, it must have 32%.
The discovery of the structure of DNA was useful because it revealed how mRNA was used to make proteins. There are four nitrogen bases of DNA nucleotides are such as adinine, thymine, guanine and cytosine.
HDL stands for high-density lipoprotein or good cholesterol which absord cholesterol and send it to lever. The lever then flushes it from the body. High-density lipoprotein can lower your risk for heart disease and stroke.
Therefore, The nitrogenous base would pair with adenine during DNA replication is othymine. Thus, option C is correct.
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Which of the following terms would Bb
represent in an organism?
A. phenotype
B. genotype
C. genetics
Arrange the celestial bodies in our solar system in increasing order based on their size.
Jupiter
Mercury
Earth
Sun
Saturn
< < <
Answer:
Mercury, Earth, Saturn, Jupiter, and Sun
Part C-Answer true or false:
a. If a plant cell is placed in a salt solution, the central vacuole will shrink
b. If a red blood cell is placed in distilled water, it will shrink
c. If a plant cell is placed in distilled water, the cell membrane will move away from the cell wall
d. If a red blood cell is placed in a salt solution, the salt will enter the cells, giving them a strange appearance
If a mutation helps an offspring survive and reproduce, the mutation can become an____ in future generations.
PLZ I NEED HELP ASAP HELP ME PLZ . 10 POINTS WHOEVER ANSWERS PLZ , I NEED REAL ANSWERS AND DONT RUSH.!!!!!!!!!!
Answer:
An adaptation
Explanation:
If the mutation has a positive effect on the fitness of the offspring, it is called an adaptation.
What is artificial selection? How is the development of different dog breeds an illustration of artificial selection?
Answer:
Artificial selection is process in which humans select the traits in animals and plants and use animal breeding or plant breeding to produce the animal or plants with desired traits.
Different dog breeds is very good example of artificial selection because with the help of artificial selection humans can drastically alter the appearance of dogs. With artificial selection human can develop Great Dane from the tiny Chihuahua.
Answer:
When humans breed animals for a specific trait.
Explanation:
Ap Ex
Which organisms are both heterotrophic and autotrophic?
Answer:
Pitcher Plant ( venus fly trap) has both autotrophic and heterotrophic mode of nutrition. They can prepare their own food like any other plant.
Explanation:
Answer:
Cyanobacteria
Explanation:
This type of bacteria is a heterotrophic and autotrophic organism. They exhibit photoautotrophic nutrition. Sorry for the wait, I had to do some research about this.
-Aslina
cells are classified as either prokaryotic or eukaryotic according to differences in their structure. However these cells also share several traits.
Answer:
ya coz there are some difference between them , they aren't completely different .
Explanation:
Which of the following will result from the bottleneck effect?
A. Increase genetic diversity
B. Decrease genetic diversity
C. Adaptation of species
D. Reproductive Isolation
Answer:
B. Decrease genetic diversity
Explanation:
Answer:
Explanation:
decrease in genetic diversity because only some species will reproduce adequately due to the bottleneck effect
Questloh 16
16. Asexual reproduction take place in ?
Your answer:
Mitosis
Meiosis
Cytokineisis
Answer:
mitosis
Explanation:
Mitosis is essential for asexual reproduction, regeneration, and growth
Plants take in carbon dioxide from the atmosphere.
Figure 2 shows part of the carbon cycle.
Describe how carbon from the atmosphere is cycled through living organisms.
Answer:
Carbon enters the atmosphere as carbon dioxide from respiration and combustion. Carbon dioxide is absorbed by producers to make glucose in photosynthesis. ... Decomposers break down the dead organisms and return the carbon in their bodies to the atmosphere as carbon dioxide by respiration.
Explanation:
hope it helps
White tailed deer begin their reproductive cycle in the fall. Rising testosterone levels in
male white tailed deer cause them to start their breeding season around the same
time. Offspring are born the following spring and summer.
What is the most likely explanation for the white-tailed deer having a seasonal
breeding cycle instead of a monthly breeding cycle?
The explanation for the white-tailed deer having a seasonal breeding cycle should be that deer provide birth in the spring and summer.
What is seasonal breeding?It is considered to be animal species so it should be successfully mated at the time of specific times of the year. It permits the optimization of survival of young because of factors like food, water availability, etc
So, here deer provide birth in the spring and summer for avoiding the pregnancy at the time of hot summer months.
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What is the definition of the word Transformation
Answer:
significa el resultado de un proceso de cambio de forma. Sucede cuando una cosa, hecho o idea es convertida en otra.
Explanation:
Plants can help prevent erosion or contribute to erosion. Which describes how plants could contribute to erosion?
a
Plant roots grow in rocks, breaking the rocks.
b
Plants break the impact of raindrops before they hit the soil.
c
Plants slow the runoff of water and soil.
d
Plant roots hold the soil in place against wind.
Answer:
a
Explanation:
the others ones described plants helping to stop erosion
Answer:
The Answer is A
Explanation:
Plant roots grow in rocks, breaking the rocks.
A student wanted to see if covering a leaf in foil would stop it from producing starch. Why should the student put the plant in a dark cupboard for 48 hours before returning it to the light and starting the experiment?
1. To make the results reliable
2. So that the plant would photosynthesise faster when returned to the light
3. So that any starch already in the leaf was used up by the plant
4. He did that simply
Answer:
4.) He did that simply
Explanation:
I'm just guessing it's 1 because the other answers don't seem reasonable
Answer:
Putting the plant in dark for 48 hours would stop the process of photosynthesis as light is required for it. Photosynthesis produces organic sugars which are stored in form of starch in plants. The absence of photosynthesis would lead to the consumption of all stored starch making the leaf starchless. The correct answer is option D.
Explanation:
Evaluate the model.select that do NOT accurately identify the structures labeled in the picture. Choose all that apply.
Answer:
C.)Genes,E are pairs of chromosomes that code for traits.
D.)Genes,G, are segments of chromosomes that carry traits
Explanation:
A scientist is preparing to use a light microscope in her biology laboratory to view a prepared slide of algal cells.
Answer:
Due to its high magnification power.
Explanation:
A scientist used a light microscope to view an algal cells because light microscope is able to magnify objects up to about a thousand times. Various cellular organelles, such as nuclei, chloroplasts, and mitochondria etc can also be seen clearly with the help of light microscope so that's why scientist used light microscope to study algal cells.