A student observes that a popcorn kernel has a hard coat. He places the kernel in a moist paper towel and observes it for several days. He notices that the coat splits and a small root emerges. He concludes that—

water outside the seed coat exerted a pushing force, breaking the seed coat


air inside the seed coat exerted a pushing force, breaking the seed.



water outside the seed coat exerted a pulling force, breaking the seed coat.



gravity exerted a pulling force on the stem, breaking the seed coat.

Answers

Answer 1

Answer:

d

Explanation:

got it right on the test


Related Questions

which of the following statements best explains why plants wilt​

Answers

Answer:

needs more context bro

Plants wilt due to lack of water. Dehydration of the plant will cause it to collapse. They also wilt sometimes to prevent damage from high temperatures and the sun. Hope this helps.

A brown eyed person (BB) and a blue eyed person (bb) have several children. Which of these statements describe the probable eye color of their children?

1.All will have blue eyes
2.All will have brown eyes
3.Half will have brown eyes, and half will have blue eyes
4.Less than half will have brown eye

Answers

Answer:

2. B. All will have Brown Eyes

Explanation:

Brown is dominant, so all children will have Bb, brown eyes

Answer:

Im pretty sure theyll have brown eyes if not my bad

Explanation:

HOW MANY SPECIES OF WILD TURKEY EXIST?

Answers

six ! but i’m guessing there’s still more that havnt been discovered yet

Answer:

Six species

I hope this helps!

given the Dna Strand: ATG-CAG-AGA how would i transcribe the corresponding RNA Strand ?

Answers

Answer:

The RNA strand that is transcribed from the DNA strand sequence ATG-CAG-AGA is UAC-GUC-UCU, according to the complementarity of nitrogenous bases.

Explanation:

In order for DNA to RNA transcription to occur, one must be aware that:

The transcription meets the criteria of base complementarity, where a purine binds to a pyrimidine. In RNA there is no thymine, so it is replaced by uracil.  

Given a given sequence of bases the RNA resulting from transcription will be governed by these rules:

DNA: ATG-CAG-AGA

RNA: UAC-GUC-UCU

Where:

Adenine is transcribed in Uracil. Thymine (DNA) is transcribed into Adenine. Cytosine is transcribed into Guanine. Guanine is transcribed into Cytosine.

Long lashes (L) are dominant over short eyelashes (l). Complete a Punnett Square crossing two parents that are both heterozygous for long eyelashes.

Answers

I believe the answer would be
L. l
Top- L LL, Ll,
Bottom- l Ll, ll.

PLEASE HELP! :(


According to the graph, what condition is best for enzyme activity?

Answers

Answer:

C

Explanation:

Highest peck in enzyme activities

What goes in the blank ?

Answers

Answer:

I would say the answer is cells, because you basically need cells to live

Explanation:

What are the two products of Cellular respiration?

Answers

Answer:

Oxygen & Glucose are the two main reactants in Cell. Respiration.

Which of the following occurs during telophase II? Select all that apply.

1) New nuclei begin to form
2) The centrioles pull at the chromatids
3) Chromatids arrive at opposite ends of the cell
4) Chromosomes are drawn to the metaphase plate
5) Cytoplasm divides and two daughter cells are formed

Answers

Answer: 1, 3, 5

new nuclei begin to form

chromatids arrive at opposite ends of the cell

cytoplasm divides and two daughter cells are formed

Answer:

Which of the following is the correct order of the stages of meiosis II?

prophase, metaphase, anaphase, telophase

 

Which of the following occurs during telophase II? Select all that apply.

new nuclei begin to form

chromatids arrive at opposite ends of the cell

cytoplasm divides and two daughter cells are formed

Explanation:

1. Luca made the following chart for Earth's four basic movements, what needs to be correct on his chart?

Rotation Speed Revolution Speed Solar System Speed Milky Way Speed
0.3 miles/sec
18.5 miles/sec
370 miles/sec
150 miles/sec

The rotation speed and revolution speed should be switched

The revolution speed and solar system speed should be switched

The rotation speed and Milky Way speed should be switched.

The solar system speed and Milky Way speed should be switched.

Answers

Answer:

The solar system speed and Milky Way speed should be switched.

Explanation:

The speed of the Earth is with respect to how it moves around it's own axis (rotation speed), the Sun (revolution speed), solar system (solar system speed), and the milky way galaxies (milky way speed) etc.

According to this question, Luca made a chart for this Earth's four basic movements. The chart with their respective speed are as follows:

Rotation Speed - 0.3 miles/sec

Revolution Speed - 18.5 miles/sec

Solar System Speed - 370 miles/sec

Milky Way Speed - 150 miles/sec

Luca, however, made a mistake in his chart.

- The rotation speed of the Earth around its axis is correctly 0.3miles/sec

- The revolution speed of the Earth around the sun is correctly 18.5 miles/sec

- The solar system speed of the Earth i.e. around the solar system is about 150miles/hour

- The milky way speed of the Earth i.e. around local group of galaxies is about 370miles/hour.

Based on the comparison of Luca's chart and correct speed illustration, THE SOLAR SYSTEM SPEED AND MILKY WAY SPEED SHOULD BE SWITCHED.

___________ lyse infected host cells. *
1 point
effector B cells
killer T cells
macrophages
helper T cells

Answers

Answer:

Adaptive immunity also involves a memory to provide the host with long-term ... Unlike NK cells of the innate immune system, B cells (B lymphocytes) are a ... Cytotoxic T cells destroy virus-infected cells in the cell-mediated immune ... Helper T- cells are one of the main lymphocytes that respond to antigen-presenting cells.

Explanation:

Why is solar energy considered a inexhaustible energy resource

Answers

Answer:

because it doesn't run out & you can always get more

Explanation:

woo hoo

a variable that stands alone and isn’t changed by the other variables you are trying to measure

Question 6 options:

independent variable


test-o-matic group


dependent variable


control group

Answers

Answer: independent variable

Which layer is it found on?

Answers

Answer:

D. Troposphere

The increase of carbon dioxide in the atmosphere is contributing to a global rise in Earth's temperature, known as.....________ & ________ ​

Answers

Answer:

Water vapor and clouds are the major contributors to Earth's greenhouse effect, but a new atmosphere-ocean climate modeling study shows that the planet's temperature ultimately depends on the atmospheric level of carbon dioxide

Explanation:

The nucleus _____.
A.has a net negative charge

B.contains the electrons, protons, and neutrons

C.is the center core of an atom

Answers

Answer:

C

Explanation:

Answer:

C.

Explanation:

A. is wrong because the electrons are on the outermost of the atom; that would also mean that B. is wrong. C is correct because the nucleus is, in fact, the center core of the atom.

A proton is a very tiny particle inside an atom. The mass of the proton is estimated to be 0.00000000000000000000000167 g. What is the mass of a proton in specific notion?
A. 1.67 x 10 24 g
B. 16.7 x 10 -25 g
C. 167 x 10 -26 g
D. 1.67 x 10 -24 g

Answers

Answer:

The proton is 1.6726×10−27 kg

Answer:

1.67 x 10-24g

Explanation:

Which process occurs when pollen grains are transported to the female part of a
plant?
a) elongation
b) pollination
c) fertilization
d) germination

Answers

Pollination is the correct answer

Hope this helps ya......n don’t forget the brainliest :)

Answer:

Germination i believe

Explanation:


Please help on question 3 thought it was b just need somebody to agree or find the answer

Answers

Answer:

i agree

Explanation:

b explains the problem the way its supposed to

type a paragraph summarizing cellular division and differentiation
PLS HELP!!! PROJECT DUE IN 30 MINUTES!!

Answers

Answer:

Cellular differentiation is the process in which a cell changes from one cell type to another. Usually, the cell changes to a more specialized type. ... Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and during normal cell turnover.

Answer:

Cellular differentiation is when a cell changes from one cell type to another—usually, the cell changes to a more specialized class. Differentiation continues in adulthood as adult stem cells divide and create fully differentiated daughter cells during tissue repair and average cell turnover.

Explanation:

IM A DIFFERENT BREED!

Tissue → Organ → → Organism
13. Which of the following levels of organization would accurately fill the gap in the diagram above?
A cell B molecule C organism system D population

Answers

I think it is a or ABCD I don’t

Exercise 4 (Module 6.9) Glycolysis is the first of three steps in cellular respiration. Review glycolysis by matching each phrase on the right with a term on the left. Some terms are used twice.
_____ 1. Compound formed between glucose and pyruvic acid
_____2. Not involved in glycolysis _____3. Fuel molecule broken down in glycolysis
_____ 4. Produced by substrate-level phosphorylation
_____5. Invested to energize glucose molecule at start of process
_____ 6. Reduced as glucose is'oxddized _____7. Glucose converted to two molecules of this
_____8. Assembled to make ATP
_____9. "Splitting of sugar"
_____10. Carries hydrogen and electrons from oxidation of glucose
A NADH
B. Pyruvic acid
C. ATP
D. NAD+
E Glucose
F. Glycolysis
G. ADP and P
H. Oxygen
I. Intermediate

Answers

Answer:

Explanation:

?????????? i don't undrssanted

Insert word in for the line (the given statements are definitions of the word):

_______________- a threshold of resources and a maximum number of species that can survive in an environment.

______________- more than the carrying capacity.

Answers

Answer:

1: carrying capacity

Explanation:

Answer:

Explanation:

Carrying capacity _- a threshold of resources and a maximum number of species that can survive in an environment

Biological surplus - more than the carrying capacity

a cell was poisoned by a substance that destroyed all of its mitochondria. which cell transport processes would be able to still continue?​

Answers

Answer:

Nothing

Explanation:

If a cell's mitochondria were destroyed it would die. Mitochondria are the power houses of the cell and without energy, necessary reactions could not take place .

If a mitochondria stopped working the cell would not have its respiratory function such as to use carbon dioxide, water, and energy in which the cell needs to survive so the cell would eventually stop moving and slowly die out with no nutrients and energy.

For lunch, Pat had a baked potato and Erin had a hamburger with no bun. They each consumed the same amount of biomass, but from different trophic levels. In comparison to the amount of land required to produce Pat’s potato, how much land was required to produce Erin’s hamburger?
a. about 10% as much land to produce the hamburger
b. about the same amount of land to produce the hamburger and the potato
c. about 10 times as much land to produce the hamburger

Answers

I think the answer is B

The land was required to produce Erin’s hamburger is about the same amount of land to produce the hamburger and the potato. Option B. This is further explained below.

What is land production?

Generally,  land natural resource required to generate commodities and services is included.

In conclusion,  we see that It takes roughly the same amount of land to produce a hamburger as a potato.

Read more about Earth

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DESCRIBE THE FUNCTION OF A CELL MEMBRANE AND ITS RELATIONSHIP TO WHAT HAPPENS INSIDE A CELL

Answers

Answer:

cell membrane's main function is to act as a selectively permeable barrier to the transport of materials across it. Membrane is made up of phospholipids arranged in a bilayer fashion. The phospholipids are amphipathic in nature, that is, contain both a hydrophobic and a hydrophilic end.

Explanation:

17. Which of the following best describes how amino acids affect the tertiary structure of a
protein?
a) The number of amino acids determines the tertiary structure of the protein.
b) The interactions of the different R-groups with other R-groups and with their environment
determine the tertiary structure of the protein.
c) The R-group of the last amino acid that is added to a growing polypeptide chain
determines the next amino acid that is added to the chain.
d) The sequence of the amino acids in the polypeptide chain determines the protein's
primary structure but has no effect on its tertiary structure.

Answers

Answer:

It is B

Explanation:

I had this question on my test last week

The tertiary structure of the protein is determined by the interactions of the different R-groups with other R-groups and with their environment in the protein (Option B).

An R-group (also called variable group) is a side chain that is attached to the α-carbon of the amino acids, the building blocks of proteins.

The linear sequence of amino acids within a protein is the primary structure of proteins.

The second structure of proteins is determined by the pattern of hydrogen bonding in the peptide backbone. The most common secondary structures of the proteins are alpha-helices and beta-sheets.

The protein tertiary structure is the 3D (tridimensional) shape of the protein, which is due to interaction among R groups of amino acids and with their environment.

The most common tertiary structures of the proteins are globular and fibrous structures.

Finally, the quaternary structure of the proteins is determined by the interaction of several protein chains or subunits.

In conclusion, the tertiary structure of the protein is determined by the interactions of the R-groups and with their environment in the protein (Option B is correct).

Learn more in:

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Which of the following nitrogen bases is present only in RNA and not in DNA?

Answers

Answer:

The nitrogen base uracil is only present in RNA. It replaces the Thymine used in DNA and bonds with Adenine.

Explanation:

In the process of photosynthesis, plants use carbon dioxide (CO2), water (H2O), and light energy to produce a sugar (C6H12O6) and oxygen (O2). In the process of aerobic respiration, animals and plants release energy from sugar and oxygen and produce carbon dioxide and water. The chemical equations that describe these reactions look like this: 6CO2 + 6H2O + light C6H12O6 + 6O2 C6H12O6 + 6O2 6CO2 + 6H2O + energy

Answers

The question is incomplete, the complete question is;

In the process of photosynthesis, plants use carbon dioxide (CO2), water (H2O), and light energy to produce a sugar (C6H12O6) and oxygen (O2). In the process of aerobic cellular respiration, animals and plants release energy from sugar and oxygen and produce carbon dioxide and water. The chemical equations that describe these reactions look like this:

photosynthesis: 6CO2 + 6H2O + light ---> C6H12O6 + 6O2

cellular respiration: C6H12O6 + 6O2 ----> 6CO2 + 6H2O + 36 ATP

How do these equations explain why the total amount of O2 and CO2 remains the same?

Answer:

See explanation

Explanation:

If we look at photosynthesis and cellular respiration, we will realize that the both are complementary processes. The product of one process is the input material for the other process.

Respiration and cellular respiration helps to balance the amount of O2 and CO2 in nature because photosynthesis takes in CO2 and releases oxygen while cellular respiration takes in oxygen and releases CO2. This maintains the delicate balance between the both gases in nature.

Plants participate in both short- and long-distance signaling. Explain how nerve cells show these two functions, as well. (3 points)


Nerve cells release chemical signals into synapses between them (short distance). They also transverse their lengths with an electrical signal that can result in signal travel along a series of cells (long distance).


Nerve cells release hormones into the synapses between them (short distance). These hormones can also transverse the bloodstream (long distance).


Nerve cells release neurotransmitters into gap junctions between them (short distance). They also use electrochemical gradients that can travel the length of each cell quickly, along a network of cells (long distance).


Nerve cells use plasmodesmata to communicate between them individually (short distance). They also use ion-gated channels to create an electrochemical signal that can be propagated over long distances in their network (long distance).

Answers

Answer:

Nerve cells release chemical signals into synapses between them (short distance). They also transverse their lengths with an electrical signal that can result in signal travel along a series of cells (long distance).

Explanation:

Nerve cells release neurotransmitters in the synaptic cleft which are capable of affecting nearby cells such as other nerve cells and muscle cells. Neurotransmitter molecules include, among others, serotonin, acetylcholine, dopamine, norepinephrine and histamine. Moreover, the synaptic cleft is the space that separates a neuron cell and its target cell. On the other hand, neurons transmit signals through electrical impulses. Electrical impulses travel long distances in the body carried by axons of the nerves. Thus, nerve impulses connect the brain and spinal cord and they carry signals to different parts of the body.

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