Based on your knowledge of reproduction in bryophytes and ferns, is the presence of flagellated sperm in cycads surprising? Why or why not?

Answers

Answer 1

Answer:

The correct answer is - All plants share a similar life cycle

Explanation:

The sperms that the bryophytes are biflagellated whereas in ferns these are multi-flagellated that helps in the swimming to the archegonia or female part to perform the fertilization, due to the presence of water.

The sperms in cycads also have flagella for the same purpose of swimming in the pollen tube. The ferns and the bryophytes both require the same or similar life cycle that includes the flagella and water for the formation of the zygote.


Related Questions

Why were some of Schwann and Schleiden’s ideas about cells incorrect

Answers

Answer:

One of Schwann and Schleiden’s ideas was that cells were originated by spontaneous generation, which was later rejected by Virchow.

Explanation:

Schwann studied animal tissues, and by observing them, he concluded that tissues were made of cells.

Simultaneously, Schleiden arrives at the same conclusion when studying vegetable tissues.

Around 1830, they met and together proposed the first cell theory. The theory stated that:

Every living being is made of cells.Cell is the basic unit of life. Cells are originated by spontaneous generation.

Virchow, who studied human tissues, during his observations sow the cell in its dividing process. He then proposed that cells were not originated from spontaneous generation, but they were the product of other pre-existing cells and were originated by cellular division. He rejected the third state of Schwann and Schleiden’s ideas.

Binet created the first test to measure intellectual ability because he was trying to __________.

Answers

He was trying to Label students in school who needed extra help

Answer:

a on edge

Explanation:

How many cycles of β oxidation are required for the complete oxidation of activated oleic acid, 18:1(9)?

Answers

Answer:

The answer is "8 beta-oxidation cycles".

Explanation:

Please find the complete question in the attached file.

In this complete oxidation of active oleic acid 18:1(Δ9), 8 beta-oxidation cycles are required. Oleic acid is saturated fat, 9 to 10-carbohydrate fatty acid. Its double bonding is cis-focused. Its cycles for beta-oxidation required to oxidize an active oleic acid fully are 8.

It's initial two fatty acids are removed by oxidation in β - oxidation from the initial two carbon atoms. The recently formed carbon units are made up of creating temporary A molecules (acetyl- CoA). That cycle for oxidative begins with both the coffee grounds terminals of the fat lactone chain.

ligase nickname and function!

Answers

Answer:

Nickname=DNA or synthatese

Explanation:

Function =it is used in cells to join together the okazaki fragments which are form on the lagging strand during DNA replication.



Please select the word from the list that best fits the definition

minerals mined for titanium

usefulness, profitability

lightness, durability

ilmenite, rutile

automobiles, aircraft

beauty, rarity

Mark this and retum

Answers

Answer:

e

Explanation:

im just built different

Answer:

E

Explanation:

The chromosomal aberration that causes cri-du-chat syndrome can be referred to as a(n) g ________.

Answers

Answer:

"Segmental deletion" seems to be the correct answer.

Explanation:

A special sequence range of approximately [tex]1\times 10^6[/tex] bp scattered segmental transposable elements containing DNA over a system or zone of [tex]2\times 10^6[/tex] bp edge. About [tex]1.6\times 10^6[/tex] bp, including that of the special sequence DNA, is destroyed if recombination happens between some of the segmental duplications.

One of the reasons you might struggle to lift a heavy object with your arm fully extended is because:_______.

Answers

Answer:

the overlapping decreases between the thin and thick filaments.

Explanation:

When w extend our hand or arm to the full and try to lift any heavy object, we are unable to lift the object inspite of applying all our force. We struggle hard to lift the object with our fully extended arm because when we extend our arm fully it decreases the overlapping of our thin and the thick filaments of our muscles which makes it difficult to lift. In other words, the resting length of our arm is the optimal length to generate force.

Yellowstone National Park there are rocks formed that are both extrusive and intrusive igneous rocks. It is important to note that the main difference between them is _________.

Question 6 options:

How they formed; intrusive rocks formed from lava and extrusive rocks are form from magma


How they formed; extrusive rocks formed from lava and intrusive rocks formed from magma


Where they are found; extrusive rocks are only found above ground


Where they are found; intrusive rocks are only found above ground

Answers

Answer:

The correct answer is - Where they are found; extrusive rocks are only found above ground

Explanation:

Intrusive and extrusive rocks are the two formed in Yellowstone natIonal park but there is how and where they formed that makes them different from one another. they both are igneous rocks.

The major difference between extrusive rocks and intrusive rocks is that extrusive rocks are formed on the surface or above the earth's surface from the lava that is magma thurst out from underground. Intrusive rocks are formed within the crust from the magma after cooling down and solidify.

Sort the bones based on whether they belong to the appendicular skeleton or the axial skeleton.

Answers

Answer:

The axial skeleton includes the bones that form the skull, laryngeal skeleton, vertebral column, and thoracic cage. The bones of the appendicular skeleton (the limbs and girdles) “append” to the axial skeleton.

The appendicular skeleton is the portion of the skeleton of vertebrates consisting of the bones that support the appendages. There are 126 bones. The appendicular skeleton includes the skeletal elements within the limbs, as well as supporting shoulder girdle pectoral and pelvic girdle.

Explanation:

hope this helps let me know if you need anymore help!!

Axial: sternum, mandible, vertebrae
Appendicular: phalanges, tibia, scapula,

Remember axial is the middle of the skeleton (cranium, spine etc). While appendicular is surrounding the axial (like your limbs etc)

Characteristics of marchantia​

Answers

Answer:

Dark green Marchantia gametophytes (sexual plants) are branched and ribbonlike, about 1.3 cm (0.5 inch) wide and 5 to 13 cm long. The diamond-shaped markings on their upper surfaces, signs of interior air chambers, have a central pore through which air diffuses.

Explanation:

he diploid zygotes develop into sporogonium or sporophyte. The sporophyte is differentiated into the foot, seta, and capsule containing numerous sporogenous cells, which by meiosis cell divisions forms the tetrad of haploid spores that represent the first gametophytic stage.

Which of the following statements is best demonstrated by the model?

Answers

Answer:

i think d is correct

Explanation:

Answer:

i think d is correct ‍♀️

tRNA molecules bring a specific ________________ to the ribosome, according to the ______________. *
2 points
protein, mRNA anti-codon
protein, tRNA codon
amino acid, tRNA anti-codon
amino acid, mRNA codon

Answers

Answer:

tRNA molecules bring a specific amino acid to the ribosome, according to the mRNA codon.

Explanation:

In the context of protein synthesis, an mRNA molecule contains the specific codons that encode the amino acids that will be part of the protein. The tRNA is in charge of bringing the amino acids to the ribosome, according to the specific information of the mRNA codons.

The function of tRNA depends on the complementarity that exists between the mRNA codon and the anti-codon tRNA, in such a way that :

The pattern in the amino acid sequence of a protein is indicated by mRNA tRNA has a complementary anticodon, so it will only bring the specific amino acid that the codon encodes.

In general terms, each mRNA molecule possesses the genetic code that indicates the amino acid sequence of a protein, and tRNA helps bring those amino acids to the ribosome for synthesis to occur.

What is the location on the stem where the leaf connects?
node
arrangement
whorled
root

Answers

Answer: node

Explanation: Leaves are attached to the plant stem at areas called nodes. An internode is the stem region between two nodes. The petiole is the stalk connecting the leaf to the stem. The leaves just above the nodes arose from axillary buds.

Answer:

node

Explanation:

The number of leaves that appear at a node depends on the species of plant.

What causes the differences in physical characteristics like hair color among people?

different versions of genes
variations in DNA length
different numbers of chromosomes
variations in cell nucleus size

Answers

Answer:

The answer is A. different versions of genes

Answer:

A

Explanation:

Different versions of genes

please help!!!!!!!!!!!!!!! almost due!!!!!!
4. *A simple circuit is created with one pathway, one battery, one light bulb, and one switch. Why does the bulb go out when you open the switch?
a. Because the battery-dies.
b. Because opening the switch opens the circuit.
c. Because too much electricity flows through the bulb:
d. Because there is too much voltage

please explain why you pick the answer​

Answers

c.


and yes it a the right answer i checked everything double checked and it absolutely right

A blonde woman uses dye to change her hair color to red;
however, her children WILL NOT INHERIT this red hair color because the
woman does NOT have *
O A) genes for red hair in her skin.
O B) proteins for red hair in her stomach cells.
O C) proteins for red hair in her brain.
D) genes for red hair in her gametes.

Answers

Answer:

D

Explanation:

Answer:

D,  genes for red hair in her gametes.

Explanation:

Because of the genetics. unless a family member or the father has red hair, in any relation (not including dye) then the children will not inherit the hair.

PLEASE HELP ME WITH THIS QUESTION

Answers

Answer:

D

Explanation:

The answer to your question is D

A new microorganism is isolated from a lake and is placed into a solution of KCl. The voltage difference across its membrane is measured at 120 mV. How much energy is required to move a proton from the negative side of the membrane to the positive side?

Answers

Answer: [tex]\Delta U=[/tex] 1.922x10⁻²⁰ Joules

Explanation: Electric Potential Energy (U) is the energy a charged object has due to its location in an electric field and it will only exist with the object is charged.

Voltage or Electric Potential Difference (V) is external work done to move a charge from one point to another in a electric field.

These terms have a relationship, which is given by:

[tex]\Delta U=q\Delta V[/tex]

where

q is the charge

Proton is positive and has a charge of 1.6x10⁻¹⁹C.

Unit for potential energy is Joule (J). The relation between mV and J is

1mV = 10⁻³J

Then:

V = 120x10⁻³

V = 0.12

So, for a proton to move from the negative side of a membrane to the positive:

[tex]\Delta U=q\Delta V[/tex]

[tex]\Delta U=1.6.10^{-19}.0.12[/tex]

[tex]\Delta U[/tex] = 1.922 x 10⁻²⁰

Energy necessary to transport a proton from negative side of the membrane to the positive is 1.922 x 10⁻²⁰J.

Digestion of an unlabeled carbohydrate results in increased amounts of the monosaccharides glucose and galactose. Which is most likely to be the original, unlabeled carbohydrate?

Answers

Answer:

lactose  

Explanation:

Lactose is a disaccharide sugar made up of glucose and galactose monosaccharide subunits. In lactose, galactose and glucose molecules form a covalent glycosidic bond denoted as an (β-1→4) glycosidic bond. Lactase is an enzyme that hydrolyzes lactose into glucose and galactose, which can be then absorbed into the bloodstream by the cells lining the small intestine. In an alkaline solution, lactose may also isomerize to generate a mixture of lactulose (20-30%) and lactose (70-80%).

what Brain activity can I do with people to help promote brain power (stimulate my brain)​

Answers

Puzzles,word search ,jigsaw, riddles etc

What is the length of a 0.2-mm object expressed in je m?

O 200 pm

O 0.02 pm

O 200.000 jem

Answers

Answer:

200.000 in je m

Explanation:

1 je m is equal to 1000 mm.

Therefore 0.2 mmm will be equal to 1000 × 0.2 mmm

This will give us 200 je m.

What stages of replication do both cycles have in common? Describe the virion action at each of these stages.

Answers

Answer:

Attachment, Penetration and Replication

Explanation:

A bacteriophage is a virus that attacks bacterial cells. The lytic and lysogenic cycles are two methods of viral replication. In the lytic cycle, the virions produced are released from the host cell whereas in the lysogenic cycle, viral nucleic material are incorporated into host nucleic material and are copied to daughter cells when the host cell reproduces. The common steps in both cycles are given below:

1  Attachment – in this step, the bacteriophage attaches itself to the surface of the host cell so as to insert its DNA into the host cell.

2. Penetration – the virus inserts its DNA into the host cell by penetrating the cell membrane of the host cell.

3. Replication – the viral nucleic material is replicated using the host cell's replication mechanism.

The stages of replication is  Attachment, Penetration and Replication

The following information should be considered:

A bacteriophage means the virus that attacks bacterial cells. The lytic and lysogenic cycles comrpise of two methods of viral replication. In the lytic cycle, the virions generated are released from the host cell while on the other hand in the lysogenic cycle, viral nucleic material are existed into host nucleic material and also they are copied to daughter cells at the time when the host cell reproduces.

The common steps in both cycles are given below:

Attachment – in this step, the bacteriophage attaches itself to the host surface cell to insert its DNA into the host cell. Penetration – the virus inserts its DNA into the host cell via penetrating the cell membrane of the host cell. Replication – the viral nucleic material is replicated using the host cell's replication mechanism.

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A student was asked to compare a cell to a typical home. In this analogy, the cell mitochondria are like the (floor,furnace,or roof) and the cell membrane is like the (walls,doors and windows,oven orattic or garage)

Answers

Answer:

um...

If A Plant Cell Were A House...

Cytoplasm

Vacuole

The Cytoplasm

would be the carpeting. The Cytoplasm is the goo that all the organelles reside in, and all the furniture and stuff in the house kind of sit there in the carpeting.

The vacuole would

be the closets and pantries. The vacuole holds random things that the cell needs, and closets and pantries can hold anything you feel like putting in them, like food or clothes.

Lysosome

Mitochondrion

The mitochondrion would be the kitchen. It produces energy for the cell to use, and the kitchen produces food, energy for humans.

Nucleus

Endoplasmic Reticulum

Rough

The nucleus would be my mom. The nucleus controls the cell, and my mom controls my house.

Ribosomes

The Smooth ER would be just plain hallways. The ER is a vast network of tubing that things the cell needs travel down.

The Rough ER would be hallways filled with cattle. This wouldn't be a very good example, because it isn't a very vast network. A lot of people travel down them, though! The Rough ER is like smooth, except with ribosomes.

If you had a herd of cattle in your yard, it would be them. If not, just the kitchen, like the Mitochondrion. Ribosomes synthesize proteins, and cattle make milk, which is full of protein. Also, in the kitchen you can make proteins with different types of dairy, like cheese or milk.

Smooth

Lysosome

Golgi (apparatus)

The Lysosome would be the trashcans, the recycle, and the compost. The Lysosome kills bacteria and holds it in plus other waste, and we dispose of our waste by putting it in one of the above options.

The Golgi (apparatus) would be my dad. The Golgi sorts and packages macromolecules to get them ready to transport. My dad does the same sort of thing, he's in charge of kind of organizing/sorting things around the house.

Cell Membrane

The Cell Membrane would be

the doors and the screens (on the windows). The cell membrane is a semi-permeable barrier, meaning that some things can get through and some can't. For example, only people who have the right key can open the door. Also, with the screens, air can get in, but flies and bees can't.

Chloroplast

Cell Wall

The Chloroplasts would be solar panels, if you had any, or houseplants if not. The Chloroplasts convert sunlight into energy, and both houseplants and solar panels do this same job.

If a cell were a house,

the walls, floors, and ceiling would be the cell wall because they keep everything in the house inside, just like the cell wall keeps all the organelles inside the cell.

By: Erin M.

find what you need in here ok

Explanation:


What causes this change in fur color?

Answers

Hair dye does .jason doe doe did dows

What is the meaning of life ?​

Answers

Answer:

The actual meaning of life is to fulfill your purpose in life and accomplish your goals. What I mean by this is, everyone has a purpose, of why they are living. None of us will be here if we all didn't have a purpose

Explanation:

Which phase of the Moon rises in the east as the Sun rises in the east

Answers

Answer:

Rise, Transit and Set time

Explanation:

What is a vein in rock?

Answers

Answer:

Vein, in geology, ore body that is disseminated within definite boundaries in unwanted rock or minerals (gangue). The term, as used by geologists, is nearly synonymous with the term lode, as used by miners. There are two distinct types: fissure veins and ladder veins.

Explanation:

Material deposits known as geological veins are created when an existing rock fracture is filled with a new mineral.

How rock veins are formed?

   

They are fascinating to planetary scientists because they frequently reveal information about historical water flow. For instance, a lot of rocks have natural pores.

A vein in geology is a distinctive sheet-like body of mineral crystals embedded into a rock. When precipitation occurs, mineral components that are transported by an aqueous solution within the rock mass are deposited as veins.  

Therefore, it is thought that aqueous solutions carrying different elements migrate through rock fissures and deposit their load onto the fissure walls when vein deposits occur, rising water that is hot.

Learn more about rocks, here:

https://brainly.com/question/993114

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Most species of deer are known to eat many different types of plants. Other than being herbivores, identify the category of species that explains how deer are very adaptable to new environments.

Answers

Answer:

they are invasive species

Explanation:

Invasive species can be defined as a category of non-indigenous species that may cause environmental harm. Invasive species have a high fecundity rate, an important dispersal capacity, highly plastic phenotypes, general habitat preferences, ability to circumvent biological controls (i.e., competitors, predators, diseases), etc. In consequence, these features become invasive species practically impossible to eliminate after introduction into a certain area and highly adaptable to new environmental conditions.

The category of species that describes how most species of deer can adapt to new environments is: invasive species.

Note the following about Invasive species:

Invasive species are usually non-native species in a new environment.They have high fecundity rate, meaning they reproduce faster.They have variety of food they can become adapted to feeding on.They have high survival rate.They can invade an habitat and disrupt the ecosystem.They are pretty difficult to control.

Most species of deer is are typical examples of invasive species.

Therefore, the category of species that describes how most species of deer can adapt to new environments is: invasive species.

Learn more here:

https://brainly.com/question/16698000

Which two pieces of equipment did the geologist most likely use to determine the density of the copper nuggets?

Answers

A glass flask and sodium and hydrogen hope it helped

the egg of an animal is most like which part of a plant

Answers

Answer:

It is the seed of a plant because both have to break open to start a life. Hope this helps please reward brainlist.

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