BIOLOGY COLLEGE

Which of the following protists are correctly paired with their mode of locomotion? euglenas, cilia amoebae, flagella volvox, pseudopodia paramecia, cilia​

Answers

Answer 1
Answer:

Paramecium use cilia for locomotion. So the correct option is D.

What is locomotion?

In ethology, locomotion refers to any of the many animal motions that enable creatures to move from one location to another. All creatures need control and propulsive systems to move about. A contractile structure—usually muscle—is used by animals' various propulsion systems to produce propulsion force.

The neuralsystem initiates and coordinates the number, quality, and position of contractions; it is via this coordination that rhythmic motions of the body's appendages or core result in locomotion. The great majority of the many physical settings (ecological niches) that animals successfully occupy on Earth may be categorized into four categories for the sake of discussing locomotion: airborne (including arboreal), aquatic, fossorial (underground), and terrestrial.

Gravity and drag, the physical impediments to movement, are the same in each environment; only their strengths vary. Here, gravity is defined as a body's weight and inertia (resistance to motion), while drag is defined as any movement that reduces force.

Therefore the correct option is D.

Read more about locomotion, here

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Answer 2
Answer:

Answer: paramecia, cilia

Explanation: Paramecia use cilia to travel. Euglenas whip through water using a flagella to travel. The volvox uses cilia while the amoeba uses its pseudopodia.

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Imagine you discover a yeast mutant that exhibits a general inability to grow and thrive compared to wild-type yeast. You predict that the mutant has a defect in a basic process necessary for survival and therefore examine the cellular levels of 200 common proteins, as well as the levels of tRNAs and rRNAs. You discover that tRNA and rRNA levels are normal, but the levels of all of the proteins you examine are much lower than they are in the wild-type yeast. This suggests that there is a general defect in:
Which of the following describes a negative feedback loop?A. When the heart rate is too high, the body releases hormones that continually increase the heart rate higher. B. When a pregnant woman is in labor, the body releases hormones that increase the intensity of contractions, which then increases the secretion of the same hormones. C. When blood sugar concentration is above normal, the endocrine system releases hormones that lower the blood sugar concentration until it reaches a normal level, and the release of the hormones slows. D. When a person is jogging, the body releases hormones that continually decrease the rate of oxygen supply to the legs.
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A few organisms have evolved to use mostly asexual reproduction. what must be true about these?

3. During which stage of the cell cycle would a cell contain the least total amount of DNA?

Answers

Answer:

I think meiosis because it becomes 1 pair of chromosomes, compared to 2 pairs during other stages

Explanation:
S phase is the period during which DNA replication occurs. The cell grows

Galactosemia is a recessive human disease that is treatable by restricting lactose and glucose in the diet. Susan Smithers and her husband are both heterozygous for the galactosemia gene. If Susan and her husband have four children, what is the probability that: a. none of the four will have galactosemia?b. at least one child will have galactosemia?c. only one child will have galactosemia?d. the first two will have galactosemia and the second two will not?e. two will have galactosemia and two will not, regardless of order?

Answers

Answer:

a. 81/256

b. 175/256

C. 1/4

D. 9/256

E. 54/256

Explanation:

Since both parents are heterozygous for galactosemia (Gg). The possibility of their children will be

GG Gg Gg gg. The probability for one child to be unaffected is 3/4 and affected is 1/4 since it is a recessive diseases:

A. Probability for none of the four children to be affected is 3/4*3/4*3/4*3/4=81/256

B.

Since the probability of unaffected children is 81/256

The probability that at least one child will be affected is 1-(3/4*3/4*3/4*3/4)=1-(81/256)

= 175/256

C. The probability that only one if the child will be affected is 1/4

D. The probability that the first two will have galactosemia and the second two will not is

1/4*1/4*3/4*3/4=9/256

E. The probability that two will have galactosemia and two will not, regardless of order.

Since the probability that two will have galactosemia and two will not is 9/256.

The total possible outcome that 2 among 4 children will be born regardless of order (first and second, first and third, first and fifth, second and third, second and fourth, third and fourth) is 6

Hence the probability two will have galactosemia and two will not, regardless of order is 9/256*6= 54/256

What do I already know about chemical and physical properties and changes? Identifying Pure Substances Which of the following is a pure substance? Select all that apply. A. air
B. distilled water
C. iron sulfide
D. oxygen gas
E. seawater
F. sodium chloride​

Answers

Answer: db a

Explanation:

Write ten ways by which water bodies are polluted ​

Answers

Answer:

A few ways could be

-toxic waste

-trash and plastic

-sewage

-indirect contamination

-bacteria and parasites

-mining

-burning fossil fuels

-direct marine dumping

-oil leak

-chemical pesticides

Explanation:

These are the 10 I found and came up with but there are many detrimental ways that we directly and indirectly effect the pollution of water.

What is one way that bacteria and archaea differ?

Answers

One way that bacteria and archaea is in the structure of the cell membranes. 
structure of the cell membranes

How does mitosis provide for genetic consistency in an organism and why is this important?

Answers

 Mitosis is Asexual reproduction. It promotes genetic consistency because all offspring are exactly identical to the parent, unlike meiosis where homologous chromosomes are randomly dispersed between four daughter cells. organisms that only reproduce asexually are at a disadvantage because all organisms in their population are identical so if there were to be a major environmental change, they would have less of a chance of survival compared to a population of sexually reproducing organisms that are all genetically different.
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