1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
Oksana_A [137]
3 years ago
13

Can somebody answer the unsolved ones ?

Biology
1 answer:
kherson [118]3 years ago
4 0
There are 15 students in math class.at the begning of class everyone races into class as everyone love maths.the professor takes note of the first 5 students who gets class and ranks them according to the order in which they entred as their top 5 favourite students. in how many different ways could the professor rank their top 5 students using formulla from combinations and permutations
You might be interested in
3)Amphibians hatch out of their eggs with:
Lunna [17]

Answer: I'd say the answer would be (A)

Explanation:Depending on the Anphibian, they breathe through their lungs and skin at first and develope Gills later in life. Some are born with gills and lungs. But normally they start with lungs first.

5 0
3 years ago
Question 7 in the attachment, please help thank you so much!
sertanlavr [38]

Answer:

Here are the answers:

a. 4  Cell determination as an issue in the *rest is missing*

b. 4  They assumed that different ways of separating an embryo into two parts would be equivalent as far as the fate of the two parts was concerned.

c. 4  I and III only

Explanation:

The passage demonstrates the importance of two factors in the development of an embryo: cleavage planes of division of embryonic cells and cell differentiation.

Cleavage Planes:

Cleavage basically refers to the division of the zygote into a large number of cells called blastomeres. Cleavage planes are geometrical lines or orientations along which cleavage takes place. Since, all embryonic cells are the precursors of some type of body cells, the cleavage planes determine if the cells are adequate for growth and development.

Cell Differentiation:

Cell differentiation is the transition of an undifferentiated cell into a specialized one. For example, stem cells are undifferentiated cells that develop into progenitor cells that mature into a specific cell lineage. For an embryo to regenerate, the presence of adequate embryonic stem cells is crucial. Embryonic stem cells are present in abundance before the gastrulation phase of embryonic development, after which they rapidly start differentiating.

5 0
3 years ago
Why was helium and hydrogen the first elements to show up in the universe?
laiz [17]

Hey there! I could help you out with your question.

°.✩┈┈┈┈∘*┈┈୨♡୧┈┈*∘┈┈┈┈✩.°

According to research it claims that "Within about 3 minutes after the Big Bang, conditions cooled enough for these protons and neutrons to form hydrogen nuclei. ... This is when recombination occurred — neutral hydrogen (and helium) finally appeared because they could “recombine with” (hold on to) electrons without easily losing them to stray radiation."The Big Bang created the elements on the periodic table, building blocks that help make up the universe. ... In stars, hydrogen atoms fuse to create helium — the second most common element in the universe, according to Encyclopedia.com. Helium has two protons, two neutrons and two electrons. Hydrogen is known to be the first element in the periodic table of elements. It has one proton in its nucleus and one outter electron. It is a very light gas and also flammable. ... Its atomic symbol is H and its atomic number is one.

°.✩┈┈┈┈∘*┈┈୨♡୧┈┈*∘┈┈┈┈✩.°

Hope this helps .+(´^ω^`)+.

5 0
2 years ago
Help plz. Thanks. Only answer if you know it plz.
Irina18 [472]

Answer:

Each one is fromt the plant cell

Explanation:

3 0
3 years ago
Instructions for an inherited trait are called
NNADVOKAT [17]
Instructions for an inherited traits are called genes.
3 0
2 years ago
Read 2 more answers
Other questions:
  • What can happen when earth materials overcome the force of friction holding them together?
    6·2 answers
  • What is the difference between sporozoites and merozoites
    8·2 answers
  • What happens when you touch a poison dart frog?
    11·1 answer
  • Because water is a polar molecule, it makes an excellent solvent for polar and _________ compounds found within cells and tissue
    13·1 answer
  • Where does the matter in the body of an animal come from?
    7·1 answer
  • Suggest why drugs that prevent reflex action from occurring should be avoided
    12·1 answer
  • what are the two structures you would find at a passive continental margin that you would not find at an active continental marg
    13·1 answer
  • Materials and waste that are removed from a cell with the use of a vesicle is called ?
    10·2 answers
  • HIIIIII I NEED HELP ON MY QUESTIONS I HAVE LIKE 11 SO IF YOU COULD PLS ANSWER THEM I BEEN ON THIS TEST FOR 4 DAYS AND ITS ABOUT
    8·1 answer
  • (AKS 4c, DOK 3) Which explanation below accurately describes the
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!