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grin007 [14]
3 years ago
5

An organism of the genus Staphylococcus is ________, while an organism of the genus Spirochaeta is ________.

Biology
1 answer:
Pavel [41]3 years ago
3 0

Answer:

The question lacks options, the options are:

A) spherical / rod shaped

B) rod shaped / coiled

C) spherical / coiled

D) coiled / spherical

The answer is C

Explanation:

All life forms has been classified into a major wide group called DOMAIN. Bacteria is one of the set of organisms classified in this domain. Bacteria are single-celled organisms composed of different species represented by different genera. Two of those genera is the basis of this question; Staphylococcus and Spirochaeta.

Staphylococcus is one of the genera of bacteria. It consists of species that are gram-positive and spherical in shape (coccal) while Spirochaeta is a bacterial genus that consists of species that are gram-negative, motile and spiral or coiled shaped.

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Cell walls are impermeable to transport of most materials required for bacterial nutrition.
mezya [45]

The given statement is False.

The bacterial cells walls are composed of peptidoglycan, also known as murein. It comprises polysaccharide chains cross-linked by unusual peptides, involving D-amino acids. The bacterial cell walls are distinct from cell walls of fungi and plants that are made up of chitin and cellulose, respectively.

The cell walls in bacteria allow small molecules to pass through them freely, however, do not permit large molecules to pass through them, in this manner, it function as a coarse filter.

The main function of the cells wall is to sustain the shape of the cell and inhibit the cell from bursting due to osmotic pressure. The cell wall allows the components to pass, which are essential for bacterial nutrition.


8 0
2 years ago
Read 2 more answers
Which of the following chemicals opens us binding sites allowing muscle filaments to connect to each other? Select one:
HACTEHA [7]

Answer:

The correct answer will be option-D.

Explanation:

Calcium plays an important role in muscle contraction as they are released from the sarcoplasmic reticulum after they receive electric impulse.

Calcium triggers the muscle contraction cycle as these calcium ions bind to the troponin-tropomyosin complex. This binding exposes the myosin-binding site on the actin on which high energy myosin binds and cross-bridge is formed.

This cross-bridge formation causes the contraction of the sarcomere and therefore muscle contracts.

Thus, option-D is the correct answer.

3 0
3 years ago
106US Gregor Mendel performed numerous dihybrid crosses between pea plants. Dihybrid
Ivanshal [37]

Answer: 25% of the offsprings will be heterozygous for both traits

Explanation: A cross between BbFf and bbff will yield 16 offsprings with four different possible genotypes: BbFf, Bbff, bbFf, and bbff. Only BbFf is the genotype that is heterozygous for both traits, and there are four offsprings with BbFf genotype.

Therefore the percentage of the offsprings that are heterozygous for both traits is 4/16 x 100 = 25%

See the punnett square for the details of the dibybrid cross

3 0
3 years ago
Proteus vulgaris has a doubling time of roughly 28 minutes. If an initial population of 500 cells is allowed to grow for 6 hours
romanna [79]

<u>Answer:</u> The final population of Proteus vulgaris after 6 hours is 3.71\times 10^{6}cells

<u>Explanation:</u>

We are given:

Proteus vulgaris divides and doubles every 28 minutes

Total time given = 6 hours = 360 min      (Conversion factor: 1 hr = 60 min)

Number of times Proteus vulgaris doubles in 6 hours = \frac{360min}{28min}=12.857times

Calculating the number of bacteria after 6 hours under ideal conditions:

We are given:

Initial population = 500 cells

Number of times it doubles = 12.857 times

Final Proteus vulgaris population = 500\times 2^{12.857}=3709476.8=3.71\times 10^{6}cells

Hence, the final population of Proteus vulgaris after 6 hours is 3.71\times 10^{6}cells

8 0
3 years ago
Because most nerve cells do not typically undergo mitosis, they are generally not capable of which of the following?a.producing
DiKsa [7]

Answer:

B. generating more nerve cells

Explanation:

Mitosis is the process whereby a cell divides into two genetically identical daughter cells. It is way through which living cells reproduce and multiply themselves.

Hence, a nerve cell that do not typically undergo mitosis will be incapable of replicating/multiplying itself, hence, unable to generate more nerve cells.

8 0
3 years ago
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