Answer:
After pollen grows a tube down the style, sperm cells travel to the ovary (option D).
Explanation:
In angiosperms, the pollen grain contains the male gametophytes that are transported to a flower for pollination to occur.
Once the pollen reaches the stigma of a flower, from it grows a tubal extension, called a pollen tube, which grows into the ovary. The pollen tube allows male gametophytes (sperm cells) to come into contact with female gametophytes (eggs) to fertilize them.
The other options are not correct because:
A. Egg cells do not attach to the embryo, but to the sperm to produce that embryo.
B. Chromosomes split in half occurs in cell division.
C. Pollen sticks to stigma is a process that occurs before the pollen tube is formed.
A doctor sees a patient who has kidney failure lack of motor coordination
Answer:
What's the question????
How does the term “selectively permeable” apply to a membrane?
Answer:
Explanation:Selectively permeable means a membrane allows the passage of some molecules or ions and inhibits the passage of others. The capacity to filter molecular transport in this manner is called selective permeability
Answer:
Selective permeability is a property of cellular membranes that only allows certain molecules to enter or exit the cell.
For Example
water molecules
-TheUnknownScientist
6. Which statement is true?
a. Carbohydrates are made up of nucleic acids
b. Lipids are made up of amino acids
RNA molecules are made up of nucleotides
d. Proteins are made of sugars
C.
Answer:
RNA molecules are made up of nucleotides
Explanation:
Carbohydrates are made up of monosaccharides (sugars!)
Lipids are made up of glycerol and fatty acids
Proteins are made of amino acids
The primers you used in lab amplified 145 base pairs that were adjacent, but not included in the repeat. If you used a different primer that only amplified 130 base pairs adjacent to a 14 base pair repeat, and your PCR product size was 172, how many repeats were in your product?
6
5
1
4
3
2
Answer:
3 repeats
Explanation:
PCR technique used to make multiple DNA copies from a segment or small sequence of DNA that is called primer for identification or detection of the pathogen.
given:
Primer amplified base pairs - 130 that are adjacent to - 14 base pair repeats.
PCR product size was 172
So, the extra nucleotide that we get would be = product size - primer amplified
172- 130 = 42 bp
Extra repeats you got = 42/14= 3 repeats
When selectively breeding animals why don't the offspring turn out exactly the way we want them to?
Answer:
The genetics have millions of different combinations, there is also some inbreeding involved (which will cause birth defects) and the chances of getting exactly you want are very slim, kinda like winning the lottery.
At what level does the majority of an ecosystem's biomass lie?
Answer:
Trophic level 1 - Primary producers
Explanation:
Biomass is basically energy, and the most energy lies in the primary producers.
I. Plant cells are formed from fertile soil.
II. Animal cells must function properly for an organism to be healthy.
III.Cells make up the petals, stem, and leaves of a lily plant.
IV. Bacteria are produced from other living bacteria.
Which describes the statements that Schwann and Schleiden would make?
Answer:
statement IV
Explanation:
i took the quiz and got it right.
Which of these statements describe the sacrum? Check all of the boxes that apply.
It is triangular in shape.
It is part of the thoracic cage.
It is made up of five fused vertebrae.
It is located above the lumbar vertebrae.
Answer:
It is triangular in shape, and it is made up of 5 fused vertebrae.
Explanation:
Answer:
It is triangular in shape.
It is made up of five fused vertebrae.
Explanation:
i got it right
Jed and Eloise have decided that their relationship should become sexual, but they want to avoid pregnancy right now. Their survey of different birth control methods included fertility awareness methods (FAMs). Jed was surprised to learn that sperm can live for how long in the vagina?
Write complimentary strand for the following DNA sequence: CGC ATG CAC TTC
Answer:
DNA Sequence: CGC ATG CAC TTC
mRNA Sequence: GCG UAC GTG AAG
AA: Alanine, Tyrosine, Valine, Lysine.
Explanation:
Answer:
GCG TAC GTG AAG
Explanation:
in DNA strands the complimentary bases go A=T and C=G and vice versa. so whenever you come across base pairs and it asks for the complimentary DNA sequence then you plug in a new sequence that corresponds with the old one. Just know that when dealing with RNA it is slightly different. if you ever want me to explain that then lmk whenever. I'll try and get back to you. I really hope this makes sense and that i was able to help you!!!! have a great day/night.
Which biome is characterized by cold, dry conditions?
A. wetland
B. tundra
C. grassland
D. taiga
Will an enzyme work on any substance?
Explain which of the two plants in the following scenario would most likely grow taller, and why.
One oak tree is growing by itself on a lawn. A second oak tree is growing in a forest surrounded by other oak trees.
Answer:
The oak tree in the lawn will grow faster because it doesn't have to compete with the other oak trees to gain sunlight because it is out in the open. So therefore it will grow taller because it has access to more sunlight.
Explanation:
Hope this helped
When animals move into and out of an area during normal cycles, it is
referred to as:
O Emigration
O Migrations
O Immigration
O none of the above
Answer:
Migration
Explanation:
In which relationship is one organism harmed
In which Colorado Rockies scenario was there more erosion? Why was there more erosion in the scenario? ANSWER ASAP PLSSSSS
Answer:
There was more erosion in the Colorado Rockies scenario where there was steady rain compared to the scenario in the same area where there was only a drizzle. There is more erosion because the steady rain increased the volume of the river more than the drizzle did. Because there was more water added to the river, the river flowed faster. The faster a river flows, the more sediments it transports or erodes.
Explanation:
Edge
Approximately how long has the victim been dead if his body temperature was 33.1?
Answer: five hours
Explanation:
ion pumps requires proteins?
Answer:yes
Explanation:
Ion pumps are assemblies of integral membrane proteins, like ion channels, that modulate ion transport into and out of a cell or organelle, leading to generation of electrical signals. Ion pumps, however, work against their concentration gradient, so require energy input, but the energy can also be derived from the concentration gradient of another ion.
The virus attacks T cells, which coordinate the
response
Answer:CD4, or helper, T cells coordinate the immune response. These are the primary targets of HIV. As the virus destroys CD4 cells, people become susceptible to opportunistic infections and cancers
Explanation:
In relation to a food chain, what do plants and photosynthetic algae have in common?
Explanation:
They are both producers. ... Their numbers are limited by the energy they take in from heterotrophic food sources.
You are given two blue beetles and two black beetles.
a) Cross1:Youmate(orcross)bluebeetle#1toblackbeetle#1andobtain 220 black beetles in the F1 generation.
What is the dominant phenotype?
Answer:
black is the dominant phenotype.
Explanation:
The black gene "overrides" the gene that codes for blue, thus making it dominant.
Cell division is necessary for many life roles. It is needed for prokaryotes and single-celled eukaryotes to reproduce. Multicellular eukaryotes require cell division to develop from embryos into full-grown organisms. Those organisms then need further cell division for processes like growth, cell renewal, and damage repair. Describe the phases of the cell cycle, including the mitotic phases. Provide at least one major characteristic of each phase.
Answer:
The mitotic phases alternate with interphase in the cell cycle. In interphase, the G1 phase occurs first where the cell grows while carrying out cell functions unique to its cell type. Then the S phase takes place where the cell duplicates its chromosomes. Next is the G2 phase, just before mitosis where the cell continues to grow and carry out its functions. After interphase, mitosis occurs, the first phase in mitosis is prophase where the chromatin becomes tightly coiled and the nucleoli disappear. Next is prometaphase where the nuclear envelope begins to fragment, and the two chromatids of each chromosome are held together by the centromere. After prometaphase is metaphase during which the microtubules and move the chromosomes to the metaphase plate at the equator of the cell. Next is anaphase where the sister chromatids separate. After anaphase, telophase occurs where the nuclear envelopes reform around the set of chromosomes located at opposite ends of the cell. Cytokinesis also occurs which is the division of the cytoplasm.
Which coated vesicles move materials in a retrograde direction from the ERGIC and Golgi stack backwards toward the ER?
Make two fists and place them together so your knuckles are touching each other. Slide one hand toward you and the other hand away from you so your knuckles rub together. What happens? What might happen to two tectonic plates as they move this way?
Answer:
The knuckles are like a jagged surface. When they rub together, they act as obstacles to each other. It’s difficult to move the hands freely as the knuckles catch and release one another. In the case of tectonic plates, if two plates rub, they release large amounts of energy, which can cause earthquakes.
Answer:
The knuckles represent a jagged surface. When they rub together, they act as obstacles to each other. It’s difficult to move the hands freely as the knuckles catch and release one another. In the case of tectonic plates, if two plates rub, they release large amounts of energy, which can cause earthquakes.
Explanation:
i just did this and this is correct answer.
What will you see if the Moon is fully within the penumbra of the Earth's shadow? Will it be a full moon or a orange full moon (lunar). I WILL GIVE BRAINLIEST.
Answer:
Full moon..............
Explanation:
Im not sure
How many amino acid are used to build protein?
Answer:
20
Explanation:
there are 20 amino acids in a protein
A normal plant cell holds water in the vacuole of the cell. This large organelle also gives the cell support. Suppose a plant is submerged in salt water. As a result, the vacuoles collapse and the leaves wilt. This condition is called plasmolysis. Which explanation do you think best describes what happens to the cells of that plant during plasmolysis?
A. The water diffuses out of the cell to equalize the solute concentrations.
B. The water diffuses into the cell to equalize the solute concentrations.
C. The solute (salt) moves inside the cell to equalize the solute concentrations.
D. The solute (salt) pushes on the vacuole of the plant cell causing it to collapse.
Answer:
Aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
Explanation:
trust me
What are the main CHARACTERISTICS(I need characteristics not parts please.) of flowering plants?
Answer: Have pollen
Explanation: Have pollen in them
5. Which is NOT true of lipids?
a. They are commonly called fats and oils
b. They help insulate the body
They are good for energy storage
d. They store genetic information
Answer:Which of the following is NOT true of lipids in the body? Lipids are part of enzymes. Lipids in the body store energy, insulate the body, and are part of the cell membranes. Lipids are NOT part of enzymes.
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Explanation:
Explain how ADP and ATP are each like a battery. Which one is "partially charged" and which one is "fully charged"? Why?
Answer:
ATP is fully charged and ADP is partially charged
Explanation:
ATP is fully charged, because it has three phosphate groups, while ADP only has two phosphate groups.