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
Galina-37 [17]
3 years ago
7

When zebrafish eggs are laid, they are surrounded by a tough chorion. Sperm are unable to get through this chorion and must find

the tiny tunnel called a micropyle that provides a channel to the egg cell membrane. This channel is so tiny that only one sperm is able to fit through at a time. The micropyle most likely
Aids in preventing polyspermy.
Biology
1 answer:
Ivenika [448]3 years ago
5 0

Answer: Aids in preventing polyspermy.

Explanation:

The polyspermy is a condition in which more than one sperm penetrate the nucleus of the mother egg. This process results in the contribution of extra centriole to the egg. The presence of the extra centriole the first division is affected and chromosomal partitioning hampers.

In the given situation, the tiny channel of micropyle can accept only one sperm to fuse with the egg membrane thus this will aid in preventing the polyspermy.

You might be interested in
While __________ bacteria retain carbol fuchsin after acid-alcohol treatment, __________ bacteria are decolorized by acid-alcoho
Lisa [10]
<span>While Acid fast bacteria retain carbol fuchsin after acid-alcohol treatment, non- Acid fast bacteria are decolorized by acid-alcohol.
Bacteria of genus mycobacterium are best stained using acid-fast method. A mixture of Phenol and fuchsin is carbol fuchsin. In acid-slcohol, acid is hydrochloric acid.</span>
6 0
3 years ago
How would a forensic scientist MOST accurately describe the chemical properties of a cup of gasoline?
Reil [10]

Answer: A. It is liquid and weighs two pounds.

Explanation:

A provides the most details and includes a quantitative measurement however an actual cup of gasoline does not weigh 2 pounds.

4 0
1 year ago
The ability to taste the chemical PTC is due to a single gene in humans.
Ganezh [65]

0:3:1

Explanation:

Tasters have the dominant allele for the itter taste of PTC, they can be homozygous TT and heterozygous Tt.

Non-tasters are supposed as autosomal recessive characters

they are homozygous recessive tt when expressed

Given in the equation two heterozygotes parents would produce offspring with the trait in the following ratio.

Tt (parent 1)

Tt (parent 2)

 If a punnet square is made

    T      t

T  TT    Tt

t    Tt     tt

The phenotypic character is in the ratio of 0:3:1

There will be 25% chances of recessive trait of non-tasters in the progeny of heterozygous parents.

5 0
3 years ago
In the family tree below, people with the recessive trait of attached earlobes
madam [21]

Answer:

C. It is a male with atleast one dominant allele

Explanation:

In the given pedigree, the two normal parents of the generation I have one daughter with the attached earlobe. Since the trait is recessive, the daughter should be homozygous recessive to express the trait. The genotype of the daughter (shaded circle in generation II) is "aa". To have a daughter with "aa" genotype, both the parents should have one copy of "a" allele. So, the genotype of both parents is "Aa".

In generation II, individual A is non-shaded square. Squares represent males in a pedigree. Since its not shaded, it does not have attached earlobe. Both the parents are heterozygous dominant for attached earlobes (Aa x Aa = 1/4 AA : 1/2 Aa : 1/4 aa). The genotype of this individual may be AA or Aa.

5 0
3 years ago
The chemical equation shown represents photosynthesis.
Fudgin [204]
<h3><u>Answer;</u></h3>

It combines with water to form glucose.

<h3><u>Explanation;</u></h3>
  • Photosynthesis is a process by which green plants make their own food by using solar energy from the sun, together with water and carbon dioxide.
  • Carbon dioxide, water and light are all needed for photosynthesis to take place. During the process solar energy from the sun is used to convert carbon dioxide and water into the simple sugar glucose.
  • <em><u>Substance A is the above question represent carbon dioxide which combines with water in presence of light to form simple sugars and oxygen gas.</u></em>
  • The equation for the reaction is;

6CO2 + 6H2O + light energy = C6H12O6 + 6O2.


3 0
3 years ago
Read 2 more answers
Other questions:
  • Which was not included in the support for Harry Hess’s hypothesis of sea-floor spreading?
    7·1 answer
  • All glands in the body, such as salivary glands and the pancreas, are derived from which type of tissue
    11·1 answer
  • Biology Help. 6 questions?
    9·1 answer
  • Evaluate hoe the heart can be compored to a mechanical pump
    6·1 answer
  • Scientific consensus supports the idea that living organisms require oxygen. Then, a scientist discovers a type of bacteria that
    14·2 answers
  • If there are 12 chromosomes in an animal cell in the G 1 stage of the cell cycle, what is the diploid number of chromosomes for
    7·1 answer
  • What 3 carbon molecule exits glycolysis and enters the krebs cycle?
    6·1 answer
  • In the diastole phase of the cardiac cycle, which is the correct direction of the flow of blood?
    6·2 answers
  • How does the temperature affect marine animals?
    12·1 answer
  • Water has the ability to dissolve many<br> substances. This is due to which property of<br> water?
    5·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!