B. Write True If the statement is correct, and False If not,
1. Copulation is the natural act of sexual intercourse in animals.
2. The penis is the primary sex organs of male animals. It can be found in mod
mammals.
3. The fertilized egg is called zygote.
4. Hermaphrodiles are animals with both female and male sex orgons.
5. The vagina is the primary sex organ of female animals. It can be found in
most mammals.
6. All frog reproduces sexually,
7. Male mosquitoes only live for about a month
8. Female mosquitoes lay eggs in a dry container
9. Female butterfly lays from 100-300 eggs during her life
10. Reproduction is to produce, or produce new organisms of the same lype.
11. Reproductive system is the collection of Internal and external sex orgonsin
both males and females.
12 A new human Individual develops from cell called gamete
13. Sexual reproduction is making a copy of the organism with a single
parent.
14. Corolla are group of petals
15. Filament holds the anther in a position tall enough to release the pollen.
16. Petals are the obvious part of a flower, brightly colored.
17. Pistil is the female parts of a flower.
18. Stigma are the swollen structure at the end of the style. It receives the
pollen grains.
19. Sepals are the modified that support the bottom of the flower.
20. Pollen grains contains the female gamete or egg cell.
Answers
2) True
3) True
4) true
5) True
6) true
7) False
8)True
9)True
10) True
11)True
12)True
13) False
14) True
15) True
16) False
17) True
18) True
19) True
20) False
Related Questions
* Urgent Bet no one knows this *
Answers
Answer: The name of the super continent that existed millions of years ago.
Explanation:
Our continents as they exist today were once joined together into a super continent known as Pangea. Over the millennia, the land masses broke off and drifted away creating the location of the continents we know today.
(つ ^‿^ )つ Hey there!
Answer → Is the second answer, The name of the super continent that existed millions of years ago.
✨Hope this helps!✨
why cancer is not a pathogen?
Answers
Answer:
Because their cells duplicate inside of you not normally!
Explanation:
Hope this helps! Plz mark as brainliest! :)
What volume in
L
of a 0.724 M Nal solution contains 0.405 mol of Nal ?
Answers
Answer:
[tex]0.5594\ \text{L}[/tex]
Explanation:
Mol of NaI = 0.405 mol
Molarity of solution = 0.724 M
Molarity is given by
[tex]M=\dfrac{\text{mol}}{\text{Volume of solution in }NaI}\\\Rightarrow \text{Volume of solution in }NaI=\dfrac{0.405}{0.724}\\\Rightarrow \text{Volume of solution in }NaI=0.5594\ \text{L}[/tex]
The required volume is [tex]0.5594\ \text{L}[/tex].
All but one statement below tell why scientists work in groups
A.problems are complex
B.research progress takes a lot of time and money
C.some scientists are lazy and steal the ideas of others
D.research progress occurs in small steps, so many people are needed
Answers
1. If 3.2 L of nitrogen monoxide and 4.3 g of oxygen gas are combined, what volume of nitrogen dioxide will be formed? 2NO + 0, -> 2NO,
Answers
Answer:
[tex]3.2 \div 22.4 = \frac{1}{7} mol \: no[/tex]
[tex]4.3 \div 32 = 0.134mol \: o2[/tex]
Explanation:
NO is limit reactant so:
1÷7×46=6.57 grams of NO2 will form
What is the mass in grams of
1.0mole of (NH4)2S?
Answers
Which of the following statements is NOT true?
An element and a compound are pure substances.
A homogeneous mixture can be called a solution.
An element and a compound are mixtures.
A homogeneous mixture and a heterogeneous mixture can both be classified as mixtures.
Answers
Answer:
An element and a compound are mixtures.Rank the following species in order of increasing basicity. NH3, NH4 , NH2-, Cl-,H2O.
a. NH3
b. NH4
c. NH2
d. Cl-
e. H2O
Answers
Answer:
D, E, A, B, C
Explanation:
The weakest base would be Cl- because HCl is a stronger acid than that of H3O+ from which the water is formed.
Also, for NH3 is a stronger acid than +NH4. Reason is that oxygen is more electronegative than nitrogen and thus NH3 is a stronger acid than NH4+.
The stronger, the acid, the weaker its conjugate base. Thus, NH3 is a weaker base than NH4.
NH2- has the highest basicity because nitrogen is less of an electronegative element than is oxygen. Therefore, it will not want a negative charge.
Hence, the final order in terms of increasing basicity is;
Cl-, H20, NH3, NH4, NH2-
#12 don’t understand need help significantly
Answers
C. 8.80 mol H₂
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Reading a Periodic TableMolesStoichiometry
Using Dimensional AnalysisAnalyzing Reactions RxNExplanation:Step 1: Define
[RxN - Balanced] N₂ (g) + 3H₂ (g) → 2NH₃ (g)
[Given] 100 g 2NH₃
[Solve] moles H₂
Step 2: Identify Conversions
[RxN] 2 mol NH₃ (g) → 3 mol H₂ (g)
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of H - 1.01 g/mol
Molar Mass of NH₃ - 14.01 + 3(1.01) = 17.04 g/mol
Step 3: Stoich
[DA] Set up conversion: [tex]\displaystyle 100 \ g \ NH_3(\frac{1 \ mol \ NH_3}{17.04 \ g \ NH_3})(\frac{3 \ mol \ H_2}{2 \ mol \ NH_3})[/tex][DA] Multiply/Divide [Cancel out units]: [tex]\displaystyle 8.80282 \ mol \ H_2[/tex]Four flasks each contain 100 milliliters of aqueous solutions of equal concentrations at 25°C and 1 atm.
KCI
CH3OH
Ba(OH)2
CH3COOH
Which solutions contain electrolytes?
Answers
Answer:
KCl and Ba(OH)₂.
Explanation:
Hello there!
In this case, since electrolytes are substances characterized by presence of covalent bonds between the atoms forming the compound, it is possible to realize that just KCl and Ba(OH)₂ as they are species composed by cations (K and Ba) and anions (OH and Cl); therefore, they have the capacity to get ionized in aqueous solution and thus transfer electricity when present.
Best regards!
The solution containing electrolytes is the flask of KCI and [tex]Ba(OH)_2[/tex].
The correct options are a and c.
What is an electrolyte?An electrolyte is a medium that contains ions and conducts electricity through the movement of ions, but not electrons.
They are minerals present in the body, that are electrically charged.
Electrolytes help in maintaining the water balance in the body, and pH of the body.
The three primary electrolytes are sodium, potassium, and chloride.
Thus, the correct options are a, KCI, and b, [tex]Ba(OH)_2[/tex].
Learn more about electrolyte
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What does purified water and fluorine make?
Answers
Answer:
Adding fluoride to the water supply reduces the incidence of tooth decay. Fluoride protects teeth from decay by demineralization and remineralization. Too much fluoride can lead to dental fluorosis or skeletal fluorosis, which can damage bones and joints.
Explanation:
N/A
If 13.5 L of nitrogen gas reacts with 17.8 L of hydrogen gas at STP, according to the following reaction, what mass of ammonia would be produced? N2 + 3 H2 --> 2 NH3 Report your answer with proper significant figures, only a number answer is required, no units needed for this form.
Answers
Answer: N5 + H4 and then do 13.5 * 17.8 then solve so 240.3 divided by 9
Your answer is 26.7 Pretty sure
Explanation: (study)
Answer:
Work is all on the paper
How many moles are in 163.5 liters of oxygen gas?
Answers
One mole of oxygen gas, which has the formula O2, has a mass of 32 g and contains 6.02 X 1023 molecules of oxygen but 12.04 X 1023 (2 X 6.02 X 1023) atoms, because each molecule of oxygen contains two oxygen atoms.
#15 need help don’t understand
Answers
The value of the equilibrium constant for a reaction
a. changes with temperature.
b. changes with time.
c. is the same under all conditions.
d. changes with concentration.
Answers
Answer:
a. changes with temperature.
Explanation:
Hello there!
In this case, according to the thermodynamic definition of the equilibrium constant in terms of the Gibbs free energy of reaction and the temperature of the system:
[tex]lnK=-\frac{\Delta G}{RT}[/tex]
It is possible to figure out that the equilibrium constant varies as temperature does, not only on the aforementioned definition, but also in the Gibbs free energy as it is also temperature-dependent. Therefore, the appropriate answer is a. changes with temperature.
Best regards!
Where are the most reactive nonmetals located on the periodic table?
Answers
How many atoms are in a 591 g sample of gold?
116,000 atoms
1.81 × 1024 atoms
3.00 atoms
3.60 × 1025 atoms
Answers
The number of atoms present in 591 g of gold is 1.81×10²⁴ atoms
Avogadro's hypothesisFrom Avogadro's hypothesis,
1 mole of Gold = 6.02×10²³ atoms
But
1 mole of gold = 197 g
Thus,
197 g of gold = 6.02×10²³ atoms
How to determine the atoms in 591 g of gold197 g of gold = 6.02×10²³ atoms
Therefore,
591 g of gold = (591 × 6.02×10²³) / 197
591 g of gold = 1.81×10²⁴ atoms
Thus, 1.81×10²⁴ atoms is present in 591 g of gold.
Learn more about Avogadro's number:
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Which blood vessels carry blood away from the heart?
veins
arteries
capillaries
Answers
Answer:
Arteries
Explanation:
Answer: arteries. :)
Explanation:
the top one is right trust me and i took the test. :)
have agreat day. :)
2. A spider builds his web in the horns of a deer. What is the symbiotic
relationship?
I point
O MUTUALISM
COMMENSALISM
PARASITISM
O Other
Answers
Answer:
COMMENSALISM
Explanation:
Commensalism refers to the relationship that exists between two different organism that belong to different species. In this relationship neither of the organisms are harmed while either of them is benefitted. The web made by the spider between the horns of the deer increases the probability of the spider to catch its prey. The random movement of the deer helps the spider and at the same time it do not harm the deer.
What volume, in milliliters, of a 0.140 M solution of KCl contains 2.65 g of the compound?
Express the volume to three significant figures and include the appropriate units.
Answers
Answer:
Calculate moles KCl: 2.55 g / 74.55 g/mol = 0.0342 moles KCl
Volume KCl = 0.0342 mol X (1 L/0.150 mol) = 0.228 L X 1000 mL/L = 228 mL
Explanation:
Volume=288mL
Given:
Molarity=0.140 M
Mass=2.65 g
To find:
Volume=?
Molar mass of KCl = 74.55 g/mol
Firstly, we need to calculate the number of moles of KCl:
[tex]\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}} \\\\\text{Number of moles}=\frac{2.65g}{74.55g/mol} \\\\\text{Number of moles}=0.0355 moles[/tex]
In order to calculate the volume,
[tex]\text{ Volume of KCl} = 0.0342 mol * (1 L/0.150 mol) \\\\\text{ Volume of KCl} = 0.228 L * 1000 mL/L \\\\\text{ Volume of KCl} = 228 mL[/tex]
The volume in mL will be 228mL.
Learn more:
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_ C4H8O+ _O₂ _ CO2+ H₂O
balancing equations
Answers
320.0 g of NaCl would contain how many formula units? (Molar mass of
NaCl is 58.44 g/mol) *
Answers
Answer:
Formula unit = 32.9746×10²³
Explanation:
Given:
Mass of NaCl = 320 g
Molar mass of NaCl = 58.44 g/mol
Find:
Formula unit
Computation:
Formula unit = [Mass of NaCl / Molar mass of NaCl]Avogadro's number
Formula unit = [320 /58.44]6.022×10²³
Formula unit = 32.9746×10²³
Please help me!!! this is due now
Answers
There are two major isotopes of Lithium. The first has a mass of 6.015 amu and
represents 7.59%. The other is mass 7.0160 amu, which accounts for 92.41%. What is the
average atomic mass of naturally occurring Lithium?
Answers
Answer:
6.9399amu
Explanation:
Isotopes are elements with same atomic number but different atomic masses.
To determine the average atomic mass one must multiply the absolute atomic mass (amu) of each isotope times its absolute atomic mass. This will give the weight average contribution of each isotope. The sum of the weight average contributions gives the final weight average atomic mass of the element. The wt. avg. atomic mass is the value posted on the periodic table.
It is recommended that a table be sketched in the following form ...
Isotope | % fractional amt. X Isotopic mass(amu) => Wt. Avg**.
Li-6 7.59% => 0.0759 x 6.015amu => 0.4565
Li-7 92.41% => 0.9241 x 7.016amu => 6.4835
*amu => atomic mass units ∑ Li-6 + Li-7 = 6.9399amu
**Wt.Avg. => weight average contribution of isotope = fractional amt x Isotopic mass(amu)
*** Final Wt. Avg. = ∑Wt.Avg. Contributions (value posted of periodic table)
when a small amount of hydrogen gas mixes with nitrogen gas, hydrogen is the
Answers
Answer:
solvent
Explanation:
What is the pH of 2.88*10^-5 M LiOH?
Answers
Answer: 9.46
Explanation: in LiOH solution concentration of OH- ions is 2.88·10^-5 M
And pOH = -log( 2.88·10^-5 M) = 4.54. Because PH + pOH = 14.00
Then pH = 14-4.54
Methylpropene is used to make synthetic rubber and
contains 0.556g carbon, 0.0933g hydrogen. What is the empirical formula?
Answers
Answer:
CH₂
Explanation:
First we convert the given masses of elements into moles, using their respective molar masses:
C ⇒ 0.556 g ÷ 12 g/mol = 0.0463 mol CH ⇒ 0.0933 g ÷ 1 g/mol = 0.0933 mol HNow we divide those results by the lowest value between the two of them:
C ⇒ 0.0463 / 0.0463 = 1H ⇒ 0.0933 / 0.0463 = 2Meaning the empirical formula is CH₂.
name this structure
Answers
Answer:
where is the structure the picture
Explanation:
???
As a raindrop falls from a cloud to the surface of Earth,
A. its speed increases due to gravity.
B. its speed increases due to air resistance,
C. it moves at a constant speed,
<
OD. it moves at a constant velocity
Answers
Answer:
The answer is C!
Explanation:
Hope it helps
Answer D
Explanation: did the quiz ψ(｀∇´)ψ
Why wouldn’t you use Avogadro’s number to change 32.4 grams of Lithium into moles of Lithium?