answer: both aspects , sameness &variety are the result of biological evolution.
Pollen grains are formed in the anther of the flower by which sequence of events?Haploid microspore mother cells divide by mitosis to form four diploid microspores. Each microspore develops into a pollen grain by meiosis. Diploid microspore mother cells divide by meiosis to form four haploid microspores. Each microspore develops into a pollen grain by mitosis. Diploid megaspore mother cells divide by mitosis to form four diploid megaspores. Each megaspore develops into a pollen gram by meiosis. Diploid microspore mother cells divide by mitosis to form four haploid microspores. Each microspore develops into a pollen grain by meiosis. Haploid microspore mother cells divide by meiosis to form four diploid microspores. Each microspore develops into a pollen grain by mitosis.
Answer:
Diploid microspore mother cells divide by meiosis to form four haploid microspores. Each microspore develops into a pollen grain by mitosis.
Explanation:
Pollen grains contain the male gametes of a sexually reproducing plant. Pollen grains are haploid cells in nature produced by the meiotic division of microspore mother cells (located in the anther). The meiosis of these diploid (2n) microspore mother cells give rise to four haploid microspores. This process in plants is called microsporogenesis.
Each haploid microspore (n) develops into pollen grain called microgametophye (bearing male gamete) via mitotic division. During the pollen grain formation, a wall is formed around the microspores.
2. How is the pubic symphysis different in males and females?
How do I explain this? ‘The plant shows the characteristic responding to environment because...’
phototropism : shoot grows upwards in response to light stimulus.
hidrotropism : roots grow to the area with the highest water concentration.
geotropism : a coordinated process which shoot grows against gravity while root grows down the gravity.
Which eukaryotic kingdoms could be made up of multicellular organisms
Answer:
the inside
Explanation:
Which of the following are true of cells? Select the following
( WILL MARK BRAINLIEST)
Please help fast!
_ cells can be categorized as prokaryotic and unicellular
_ All cells have a nucleus
_ All cells have a cytoplasm
_ Most cells have some type of genetic material
_ All cells are surrounded by a membrane
Answer:
1 False all cells can be categorised as prokaryotic and eukaryotic, and as multicellular and unicellular ( please note that these are two different categories)
2 False , not all cells have a proper well defined nucleus as prokaryotic cells contain nuclear material instead of a nucleus
3 True
4 True
I need help please!!
Answer:
Prokaryotes and Eukaryotes are two types of cells with similarities and differences. Eukaryotes are plant cells and animal cells. They are mostly found in multi-cellular organisms. Prokaryotes are usually single-celled organisms and have a tail. Those are the examples that I remember, but there are way more similarities and differences. I hope this helped!!
The seed plants become dominant during the late when the climate became
Answer:
Cold
Explanation:
They can not survive in cold conditions
Most desert streams are depleted before reaching the ocean due to _____.
Answer:
evaporation and soil infiltration
Explanation:
Which of the following is NOT a function of proteins?
Answer:
the following is not a function of protein is glucose
4. Distinguish between the types of scientific
investigations. Does all scientific knowledge
come from experimentation? Explain your
answer. SC.7.N.1.3
Answer: Descriptive, Comparative and Experimental (which comes from experimentation).
Explanation:
There are three types of scientific investigations:
Descriptive: This type of scientific investigation studies parts of a system, which can be natural or artificial. It describes everything that is being studied and no predictions are made. There are three types of descriptive methods: case-study methods (an in-depth study is produced from many sources with different methods), observational methods (no questions asked, just an observation of the behavior of a subject and no manipulation of the variables), and survey method (some people are interviewed and the researchers study the answers.)Comparative: It gathers information from organisms, systems, places or from any source, to compare them using also a control group. But, there is no imposed treatment because it is not ethical or because it is not possible. So, the treatment is only observed.Experiment: As its names says, it uses an experimental test designed to study some phenomena, where variables are controlled so the treatment is not only observed as the comparative method. Then those variables are measured to collect information or evidence that supports or not a previous hypothesis and is used to assess theoretical knowledge. The independent variable is manipulated while the dependent variable is measured. This type of scientific investigation comes from experimentation.
If Scientist were studying plant growth of plants both on Earth and in Space, which of the following would not be
a control?
Answer:
The study of the growth of plants in space would not be controlled
Water molecules being attracted to other molecules (not water) is an example of?
Answer:
In cohesion, water molecules are attracted to each other (because of hydrogen bonding), keeping the molecules together at the liquid-gas (water-air) interface, although there is no more room in the glass.
Biology
heeeeeeeeeelp
Answer:
substrate
active site - inside enzyme
Enzyme-substrate complex
Explanation:
Given what you know about cellular organelles, what problems do you predict a cell would have if it had a defect in a lysosomal enzyme
Answer:
Cells without lysosomal enzymes will not be able to digest food and these will lead to accumulation of wastes in the cells, leading to cancerous growth and the cells will not be able to live long.
Explanation:
Lysosomes is a membrane bound organelles found in eukaryotic cells that produce lysosomal enzymes which help to breakdown or engulfs biomolecules like proteins, carbohydrates, nucleic acids, lipids it engulfs in the cells to molecules it will easily be absorbed.
Without these enzymes or defect in these enzymes, biomolecules will not be broken down and it's resultant effect is accumulation of wastes which can lead to cells destruction.
why do plant cells need chloroplast
Answer: Sample Response: Plant cells need chloroplasts so they can capture light energy to make food within the cells. Plant cells make their own food to produce energy that the cells use.
Which of the following types of cells suppress immune responses?a. Neutrophilsb. Plasma Cellsc. Macrophagesd. Regulatory T Cells
Answer:
The correct answer is d.
Explanation:
Regulatory T-cells are a class of T cells which are part of the immune system that suppresses immune response. They are called regulatory because they assist in "checking" the excesses/overreaction during immune response.
NOTE:
Neutrophils are phagocytic in nature; they ingest and destroy microorganisms or other foreign molecules.
Plasma cells synthesize antibodies which are produced in response to antigens. They are target foreign particles for digestion by other immune cells.
Macrophages are also phagocytic in nature usually found at sites of an infection.
Question 10 (2 points)
(01.03 LC)
If a box on a pan balance reads 10 kg, you can be confident that the number represents the object's
(2 points)
Оа
hardness
Ob
mass
ос
temperature
Od
weight
Submit
Saved at 5:48 am
Time left for this
assessment:
11:20
Answer:
mass
Explanation:
because the unit kg is S.I unit of mass
Viruses can reproduce many other viruses at once. Bacteria only reproduce one at a time.
O True
O False
Answer:
True
Explanation:
True ,viruses can reproduce many other viruses at once
2.
4.00
POOZE 1
nucleus outside smallest inside
electrons neutral element neutrons
largest
atom
Atoms are the smallest unit of an
Within the atom is a
which is the center of the atom. The
and
neutrons are located within the
The
are outside the nucleus. The neutron has a
charge. A helium atom is the
unit of an
element. The element helium has a mass of
A helium atom has
protons and
neutrons. The electrons are
located on the
of the
Answer:
1) element
2) nucleus
3) protons
4) nucleus
5) electrons
6) neutral
7) smallest
8) 4.00
9) 2
10) 2
11) outside
12) nucleus
Explanation:
i got help from my brother and mom btw lol.....
A student wants to illustrate the number of each different bird species that migrates south in winter. Which type of chart/graph would be the most appropriate to use?
a
Pie Chart
b
Bar Graph
c
Line Graph
Answer:
bar graph
Explanation:
A bar graph
You want to show that there is no connection between one species and another.
The line graph will do exactly the opposite. It will imply that the line joining 2 points gives some connection between one point and the next point.
The Pie chart is usually used to compare one number size with a another, like the total number of Covus 19 by state each state close to the other. It is not a good choice because California (for example) might have the most number of cases of the virus but it also has the largest population. You might use the pie chart by converting it to %s, but what would that give you, and how could you use it.
Which statement describes our Solar System?
O A. The Solar System is made of a very large collection of stars, gas, and dust bound together by gravity.
OB. The Solar System is made of a large planet with moons and other satellites in orbit around the planet.
O C. The Solar System is made of a group of planets orbiting at various distances around a large, central star.
O D. The Solar System is made of a group of galaxies and intergalactic gases bound together by gravitational attraction.
Answer:
B
Explanation:
What helps water move across the
membrane quicker?
Answer:
The sell membrane
Explanation:
Hope it helped
Answer:
A channel protein
Explanation:
A channel protein, a type of transport protein, acts like a pore in the membrane that lets water molecules or small ions through quickly. Water channel proteins (aquaporins) allow water to diffuse across the membrane at a very fast rate. Ion channel proteins allow ions to diffuse across the membrane.
Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are:_____.
a. ostracods.
b. barnacles.
c. copepods.
d. decapods.
e. isopods.
Answer:
B. Barnacles
Explanation:
Marine crustaceans that are sessile, secrete calcareous plates and filter-feed are Barnacles. Barnacles are the only sessile crustaceans known in the world.
They are characteristic to marine environments and they are usually found in shallow environments. They are edible due to their relationship with crustaceans such as shrimps etc
Identify characteristic is used to determine whether an organism is a first or second level consumer?
Answer:
i don't understand
Explanation:
kkkkkkk
What organisms, other than bacteria, are able to perform nitrogen fixation?
a.
Viruses
c.
Algae
b.
Trees
d.
Protists
Answer:
Algae is able to perform nitrogen fixation.
Answer:
The answer is C.
Explanation:
I just took the test and the answer was c.
There are 12 apples 14 oranges and 16 bananas in a fruit basket.what is the ratio apples to bananas the answer choices are A 1:12 B 1:16 C 6:7 D 3:4 E 2:7
Answer:
The answer is A
Answer:
mannn this aint ittt
Explanation:
dawggg
in atom structure what is present in the same numbers as the protons in an atom.i will make as brainlest
Answer:
Explanation:
electrons i believe. That is why an atom has a neutral charge- electrons and protons cancel each other out
Answer:
Electrons
Explanation:
An atom contains the same number of protons as electrons to maintain a negative charge. An ion is an atom which has lost or gained electrons.
Which most accurately describes the basis of the scientific method? A.) a path of clearly defined steps that must be followed in a particular order B.) a possible answer to a scientific question based on knowledge or research C.) the recipe for how to conduct an experiment that must be followed precisely D.) the process of hypothesis and testing through which scientific inquiry occurs
The statement 'the process of hypothesis and testing through which scientific inquiry occurs' most accurately describes the basis of the scientific method.
The scientific method is a series of sequential steps used to build scientific knowledge.The steps of the scientific method include:
To make observations about a given phenomenon of the natural world and formulate questions based on these observations.To pose a plausible explanation (i.e., a hypothesis) in order to answer these questions.To test the working hypothesis by experimental and/or observational procedures.To collect data in order to confirm or reject the working hypothesis.Examine results and draw conclusions.In conclusion, the statement 'the process of hypothesis and testing through which scientific inquiry occurs' most accurately describes the basis of the scientific method.
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Which process begins the formation of sedimentary rock?
the movement of sediment
the cementation of rock sediment
the breakdown of rock into sediment
the buildup of sediment in one location
Answer: C
Explanation:
Because sedimentary rocks have layers and are made of of those layers which are made up of the breakdown of rock into sediment
Name structure(s) indicated by circle