Answer:
b) estrutura que se desenvolveu do ovário e contém o embrião e reserva de alimento.
Explanation:
As sementes são formadas quando o pólen do estame se funde com os óvulos do carpelo. Existem duas porções de semente i. e. uma é a parte viva conhecida como embrião, enquanto a outra é a parte não viva conhecida como endosperma. O embrião é a planta bebê, enquanto o endosperma é o alimento armazenado de que a planta bebê necessita para seu crescimento e desenvolvimento no processo de germinação.re
Consider the following planned experiment.
Factor
Experimental Group
Control Group
amount of water
daily
daily
type of food
fresh grass
Vitamins
yes
housing
indoors
indoors
Which variable is being tested in this experiment?
fresh grass
no
A. Type of food
B. Amount of water
C. Housing
D. Vitamins
Answer:D
Explanation:cuz I just did it
Explain how and why a drop of syrup can spread through the water in a beaker without stirring?
Answer:
The syrup drop spreads in water without stirring because particles of syrup separate water molecules and bump into it and dissolve.
Explanation:
Answer:
The syrup drop spreads in water without stirring because particles of syrup separate water molecules and bump into it and dissolve.
Explanation:
This is called diffusion. If you just leave the drop of syrup in the beaker for a while, it will eventually spread out around the beaker and all of the water will become sweet.
For example:
This is just like a restaurant, there is non-smoking half of the restaurant and there is a smoking half. The smoke will eventually spread out front he smoking corner to the non-smoking corner.
Another example:
If you pee in the pool, the pee will eventually spread out through the pool.
In an observational study researchers try not to
A. Photograph any of the subjects
B. Include people who are difficult to contact
C. Ask questions that are too obvious
D. Influence the people in the study
Answer:
D
Explanation:
Does mixing compost with soil improve the growth of plants?
Answer:
yes!
Explanation:
Mixing compost with soil provides nutrients for plants today but also enhances soil for future years. The amendment naturally breaks down, releasing important macro- and micronutrients while feeding the beneficial biological organisms in the soil. It also increases the porosity of the soil and helps conserve moisture.
HELP ASAP PLEASE!
scientist adds energy to a
block of metal. According
to the kinetic theory, what
should the scientist predict
will happen to the metal?
Answer:
According to the kinetic energy, the atoms of the metal will become very energetic and will tend to vibrate more within their lattice structure.
As the atom becomes more energetic the atoms become more and more energetic tending to wriggle free from the crystalline metallic structure making the metal more malleable.
With the addition of more energy, the atoms of the metal will become more energetic than the inter atomic metallic bond and the metal starts to melt into liquid metal.
Explanation:
the negative charge in a water molecule occurs because
Answer: The unequal sharing of electrons gives the water molecule a slight negative charge near its oxygen atom and a slight positive charge near its hydrogen atoms. When a neutral molecule has a positive area at one end and a negative area at the other, it is a polar molecule.
Explanation:
Question 3 of 15
Which of the following statements best describes the function of the Golgi
apparatus?
A. Signaling gene expression
B. Producing lysosomes
C. Engulfing nutrients
Ο Ο
D. Expelling wastes
SUBMIT
Answer:
the Golgi Apparatus is a complex of vesicles and folded membranes within the cytoplasm of most eukaryotic cells, involved in secretion and intracellular transport. Therefore, I believe the correct answer would be B. Producing Lysosomes
Explanation:
which option gives an object's volume in SI units? PLEASE HELP
Answer:
what’s the answer to this
Explanation:
Answer:
which option gives an object´s volume in SI units?
-2.6m^3
In order to power an elevator, a motor must convert electrical energy into which other type of energy?
A. mechanical energy
B. nuclear energy
C. light energy
D. thermal energy
Answer:
A. mechanical energy for use
Describe and name the 5 ocean layers.
In summary, the five senses are sight, hearing, smell, feeling, and taste. The five senses work together to help you live, protect yourself, learn, and enjoy the world around you. What happens to a person's vision when they are farsighted? Seleccione una: a. Can see up close b. Can't see up close c. Can't see far way d. Need books written in braille
Answer:
b
Explanation:
unable to see things clearly, especially if they are relatively close to the eyes, owing to the focusing of rays of light by the eye at a point behind the retina; hyperopic.
Forensics- List the variables that can have a significant impact on the accuracy of a
person's observation
What are the four pillars of capitalism?
Answer:
Conscious capitalism has four pillars guiding a business for conducting socially responsible and ethical practices: purpose, stakeholder, culture, and leadership. Higher purpose: This is the idea that every business has a purpose that goes beyond making money.
Explanation:
I looked it up on the internet and this is what i got. I hope it helps
Which hypothesis is testable?
O Plants that are grown by using brand A fertilizer taste best.
O Plants that have flowers look prettier than plants that do not have flowers.
O Plants will eventually die off if global warming trends continue.
O Plants make more sugar on sunny days than on Cloudy days.
Answer:
D.Plants make more sugar on sunny days than on Cloudy days
Answer:
D. Plants make more sugar on sunny days than on cloudy days.
Explanation:
i got 100% on edge
Which two organelles are responsible for producing phospholipids and sphingolipids? A. mitochondria and proteasome B. endoplasmic reticulum and mitochondria
Answer:
Endoplasmic reticulum and golgi
Explanation:
Which of the following is not found in all cells?
Cell membrane
Genetic material
Cytoplasm
Cell wall
Answer:
option D is correct
Explanation:
cell wall is not present in all cells because it is present in plant cell but not in animal cell
Cell wall is the structure that is not found in all cells, only in bacteria and plant cells where it is attached to the plasma membrane on the outer surface.
What is a cell wall?A cell wall is a rigid structure that lies outside the plasma membrane and protects the contents of the cells of algae, fungi, plants, bacteria, and archaea.
Characteristics of a cell wallIt can be a layer of chitin (in the case of fungi), cellulose (plants), peptidoglycan (bacteria), or other materials.It is responsible for protecting the contents of the cell and absolute rigidity to the cell structure.Therefore, we can conclude that the cell wall is what covers prokaryotic cells and plant cells.
Learn more about the cell wall here: https://brainly.com/question/965751
Large waves cause erosion of shorelines. Seawalls constructed of concrete can protect shorelines from this erosion. What type of connection is made between the ideas in these sentences? (1 point)
A.
problem and solution
B.
contrast
C.
cause and effect
D.
description
Will give brainliest IF correct <3
Answer:
Problem and solution is the answer
Explanation:
The type of connection that is made between the ideas in the given sentences is known as problem and solution. Thus, the correct option is A.
What is Erosion?Erosion may be defined as a type of geological methodology through which earthen materials are washed out or eroded away and are significantly migrated from one place to another by natural forces such as wind or water.
According to the given question, large waves are the potential to cause the process of erosion to occur. So, it is basically a problem. In order to overcome the effect of this process, seawalls are constructed that can significantly protect shorelines from this erosion. So, it represents a solution.
Therefore, the type of connection that is made between the ideas in the given sentences is known as problem and solution. Thus, the correct option is A.
To learn more about Erosion, refer to the link:
https://brainly.com/question/17905503
#SPJ2
in scientific method, a part of the experiment is repeated many times in order to reduce randomness or error. These repetitions are called ____.
1. methods
2.control
3.variables
4.trials
Indicate differences between oogenesis and spermatogenesis 1. final number of gametes produced 2. timing of meiosis II 3. timing of onset of prophase I 4. final number of chromosomes in the mature gamete
The correct options indicating the difference s between oogenesis and spermatogenesis are;
1) Final number of gametes produced.
2) Timing of Meosis 2
3) Timing of onset of prophase 1
Oogenesis is process by which a diploid germ cell known as an oogonium which is found in the fetal ovary thereafter becomes a haploid ovum in the adult species after fertilization must have taken place.
During the initial stage of oogenesis,the diploid germ cell moves from the yolk sac to the fetal ovary from there, further mitotic division will occur.
Spermatogenesis on the other hand is simply the process by which haploid spermatozoa get developed from germ cells and finally to sperm production,this occurs in the seminiferous tubules of the testes.
When a cold front passes your location, the temperature drops rapidly. What happens to the air density? uncertain increases decreases remains constant.
Answer:
It increases
Explanation:
hope this helps
Answer: decreases
Explanation: when there is hot air, density rises
Breaking down food (glucose) into usable
energy for an organism's basic functions
is called what?
Heterotroph
metabolism
homeostasis
Autotroph
answer:
metabolism
Explanation:
The x-ray film shows a fracture where one side of the cortex is intact and flexed and the other side has signs of interruption (fracture). Which term best describes this type of fracture?
a. Comminuted
b. Greenstick
c. Impacted
d. Stress
Answer:
The correct answer is - option B.
Explanation:
Greenstick fractures are the type of fractures where one side of the cortex is intact and flexed while the other side is fractured. This type of fracture known as the incomplete fracture,
If any fracture have two or more lines of fracture it is called as Comminuted fractures. Impacted fractures have one segment on other. Due to the performing same activity again and again stress fracture occures that is characterized by failure of one cortical bone.
Thus, the correct answer is option B.
Type of data that is measured with numbers
Answer:
If you're talking about scientific data I believe the answer is quantitative data.
What is difference between nervous and chemical(endocrine) system???
Answer:
Endocrine system uses chemical signaling (hormones produced by glands) while the nervous system uses electrical signaling (neural impulses).
Answer:
The differences are given below ↓
Nervous System
Electrical impulses are the messengers in the nervous systemBrain and the spinal cord constitute the nervous systemNerve impulses are transmitted through neuronsThe nervous system is under both voluntary and involuntary controlNerve impulses make use of the neurotransmitters at synaptic clefts and sodium and potassium channels and enter the target cellsResponses are localisedChemical (Endocrine) System
Hormones are the chemical messengers in the endocrine system that target cells through the bloodstreamGlands and organs like thyroid, pituitary glands and reproductive organs (ovaries and testes) are involved in the endocrine systemHormones are transmitted through blood vesselsThe endocrine system is under involuntary controlThe hormones enter into the target cells by diffusing through the plasma membrane or by binding to the cell receptorsResponses are widespread
horizontal gene transfer can occur through several mechanisms. why is this relevant to humans
Answer:
Explanation:
Horizontal gene transfer helps in acquiring relevant gene that are not present in cell but are beneficial.
If a gene is lost in the cell, through gene transfer it can be regain and the various adverse effect caused through the absence of the gene can be reversed.
It also help in treatment of various disease such as cancer by introducing into the body non cancerous cells and prevent the spread of cancerous cells .
Answer:
Explanation:
Penn foster
Which ecological relationship do sea anemones and hermit crab have?
Hermit crabs and sea anemones have a symbiotic relationship.
Answer:
Symbiotic
Explanation:
Hermit crabs and sea anemones have a symbiotic relationship, meaning they live in harmony together. It's a stable connection that sidesteps the typical prey and predator relationship found in nature. The type of symbiosis they engage in is called commensalism.
Which of the following is one of the most abundant elements in all living
things?
A. Gold
B. Helium
C. Oxygen
D. Silver
Answer:
C. Oxygen
Explanation:
Most, if not all living things use oxygen in some shape or form. While Helium is the most abundant element, it is asking for living things, in which oxygen is a vital building block in maintaining life. Without oxygen, most animal species and humans would die.
~
Describe the differences between the sporophyte and gametophyte generations of seedless tracheophyte plants and be sure to discuss structures and ploidy.
Answer and Explanation:
Tracheophyte plants, also known as vascular plants, are those that possess a supportive tissue that can also conduct fluids -The Xileme- and another tissue that conducts nutritious elements produced by photosynthesis -The Phloem-. These plants have a root (basically underground), a stem (aerial), and leaves. All of them together form the corm. And the corm counts with these vascular tissues to which we referred before.
There are different types of Tracheophyte plants, some of them produce seeds to reproduce and disperse -Spermatophyta- and some others reproduce and disperse by spores -Pteridophyta-. This last seedless group corresponds to ferns and other similar plants.
Pteridophytes characterizes for having a sporophyte that has stems with leaves and a root. It also has primitive xylem composed by tracheids and phloem, both of them formed by vascular bundles located in a central cylinder.
Spores are its dispersion units and are responsible for colonizing new areas. They also constitute the resistance units under extremely unfavorable conditions.
Their life cycle is composed of the asexual phase (sporophytic phase) and the sexual phase (gametophytic).
The sporophyte, the dominant asexual generation, it is a perennial and diploid structure. Its aerial part might disappear during unfavorable seasons, but it reappears during spring or summer. The sporophyte is in charge of asexual reproductionThe gametophyte, instead, is and haploid structure, ephemeral and must be in the water for its survival, and for sexual reproduction to be successful. In the presence of water, masculine gametophyte -antherozoids- are released and they swim to the archegonium to meet the ovocell. Antherozoids can swim because they have flagella. After fertilization, a new sporophyte is produced.What are the monomers used to make carbohydrates, proteins, and nucleic acids?
Answer:
Monosaccharides, Nucleotides, Amino acids
Explanation:
Monosaccharides are the monomers that make up carbohydrates. Glucose is an example of a monosaccharide. Nucleotides are the monomers that make up nucleic acids. Amino acids are the monomers that make up proteins.
Waxing the floor helps protect it from scratches and makes it look nice. The school wants to find out whether the expensive floor wax is better than the cheap version. One liter of each brand is applied to 5 test sections in the hall. 5 other sections are not waxed. After 3 weeks, the number of scratches in each of the test sections is counted.
What is the INDEPENDENT variable in this experiment? *
Your answer
What is the DEPENDENT variable in this experiment? *
Your answer
What are the CONSTANTS in this experiment?
Help- this is for a grade :,
Answer:
INDEPENDENT variable - type of floor cleaner
DEPENDENT variable- numbers of scratches
Constants : number of test sections and size of test sections
Explanation:
Independent variable is a variable which is change dependent variable by manipulated itself, type of floor cleaner costly one or cheap one is independent variable in this case.
Dependent variable is a variable which is analyzed or measure in experiment it is something that shows response to the independent variable. In this case number of scratches before using cleaner and after using cleaner.
Constants is something in experiments that does not change in the experiment. Number of test sections and size of test sections is constant here in this case.