BIOLOGY COLLEGE

The molecules made by living cells are mainly assembled around which element?A. calcium
B. carbon
C. hydrogen
D. oxygen

Answers

Answer 1
Answer:

Answer:

Carbon atoms B.

Explanation:

The atoms of an organic molecule are typically organized around chains of carbon atoms. Inorganic compounds make up 1%–1.5% of a living cell's mass. They are small, simple compounds that play important roles in the cell, although they do not form cell structures

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What gametes are produced by the following organisms:_______. a. Genotype YyRr, if Y and R are on different chromosomes
b. Genotype YyRr, if dominant Y and R are on the same chromosome, no crossing over
c. Genotype YyRr, if dominant Y and recessive r are on the same chromosome, no crossing over
d. Genotype YyRr, if dominant Y and R are on the same chromosome, 50% crossing over

Answers

Answer:

The correct answer would be -

1- YR, Yr, yR and yr.

2. Yr, yR

3. YR, yr

4. YR, Yr, yR & yr

Explanation:

A mature male or female haploid germ cell that fuses with another gamete of the opposite sex during the process of fertilization to make a zygote in sexual reproduction.

The law of Independent Assortment presented by Mendel says that alleles for different traits are passed and assort independently of one another in the gametes.

1. If Y and R on different chromosomes then they will produce four gametes and assort independently - YR, Yr, yR & yr.

2) If Y and R on the same chromosomes and no crossing over occurs then they will produce only two gametes as Y and R will not come together - Yr & yR.

3).  if dominant Y and recessive r are on the same chromosome, no crossing over then only two gametes will form as Y and r will not assort together - YR & yr.

4). if dominant Y and R are on the same chromosome, 50% crossing over produces 4 types of gametes, YR, Yr, yR & yr.

A--What do you get if you add the number of maternalchromosomesin a somatic cell to the number of autosomes in a sex
cell, thensubtract the number of Barr bodies in a somatic cell of a
personwith kleinfelter's syndrome?

Answers

Answer:

• Men with Klinefelter's syndrome have an extra X chromosome.

• Of the 23 pairs of chromosomes, one pair is called the sex chromosomes because they determine a person's sex. One sex chromosome is inherited from the mother and the other from the father. Mothers always pass on an X chromosome, but fathers can pass on an X or a Y chromosome. -

•The normal male chromosome arrangement is 46XY, but men with Klinefelter's syndrome have 47XXY. The extra X chromosome can come from either parent.

Explanation:

A scientist added bacteria and a nutrient medium that could support the growth of the bacteria to a sterilized petri dish. No other materials were added.The graph models growth of the bacteria over time.
Bacterial Population
Time
Which of these most likely explains why the bacterial population stopped growing?
The bacteria mutated from photosynthetic to carnivorous organisms and consumed one another until all the individuals were dead.
The bacteria reproduced in the system but eventually died due to limited resources
The bacteria became diseased and were unable to survive in the closed system
The bacteria competed for nutrients and died after all the nutrients were consumed

Answers

The statement that most likely explains the stop of bacterial populations to grow is the bacteria competed for nutrients and died after all the nutrients were consumed.

What do you mean by Bacterial Growth?

Bacterial growth may be defined as the proliferation of bacterium into two daughter cells, in a process called binary fission.

When there are enough nutrients in the petri dish, a rapid increase is shown in the graph, but during the course of time when nutrients become limited, it affects the growth of the bacterial population.

Therefore, the statement that most likely explains the stop of bacterial populations to grow is the bacteria competed for nutrients and died after all the nutrients were consumed.

To learn more about Bacterial growth, refer to the link:

brainly.com/question/17817006

B - The bacteria competed for nutrients and died after all the nutrients were consumed

Can you organize these terms that describe the different kinds of cell division?

Answers

in general, there are three types of Cell division :
- Binary fission, a division process on which a cell is completely cloned, forming 2 exact same cells
- Mitosis , a division of a somatic cell of Eukaryotic organisms
- Meioses, a cell division that produces gametes

hope this helps

List five item that can be found in a science portfolio

Answers

Answer:

  1. A letter to the reader outlining each portfolio item
  2. A list of term definitions that will be helpful to readers
  3. A collection of individual goals for the year, selected and updated by students monthly, quarterly, etc.
  4. Graphics—charts, concept diagrams, timelines, photographs, etc.—showing important data such as test scores
  5. Book excerpts or quotations chosen by the student
  6. A chart tracking every free-choice book a student has read that year
  7. Reading logs
  8. Photographs of students working
  9. Anecdotal notes from one-on-one or small group time with students (e.g. guided reading notes)
  10. Video recordings of readings or performances (for ePortfolios)
  11. A sample paragraph of writing featuring a few key writing techniques
  12. Sample essays of various types—descriptive, narrative, explanatory, expository, persuasive, cause and effect, and compare and contrast are all good options
  13. Technical writing such as a process analysis essay featuring student-drawn diagrams
  14. Creative writing samples, including stories, poems, songs, and scripts
  15. A collection of graded math quizzes showing performance trends

In a population, there are 500 cats. What is the frequency of black cats if 300 are calico?

Answers

Answer:

2 out of every 5 or 2/5

Explanation:

there are 200 black cats because there are 300 calico there are 500 total so it would be 200/500 or 2/5

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