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
Alexxandr [17]
3 years ago
7

Which of the following analogies best describes the motion of a nonmotile protist? . A. A boat is moved forward by several oars.

. . B. A boat is moved forward by a current. . . C. A boat is moved forward by a single long oar. . . D. A boat is moved forward by a motor. .
Biology
2 answers:
Hoochie [10]3 years ago
4 0
B. A boat is moved <span>forward by a current</span>
Misha Larkins [42]3 years ago
4 0

The correct answer is B.)

You might be interested in
During meiosis homologous chromosomes often twist around each other break exchange segments and rejoin this process usually cont
Annette [7]

Explanation:

Crossing over, or genetic recombination contributes to genetic variation and diversity.

In early Prophase I of meiosis, crossing over occurs. This is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined. The chromosome pairs form tetrads held together at chiasmata.

Further Explanation:

All the genetic information within the eukaryotic cell is stored within the nucleus as helical DNA. This DNA is tightly wound around histones as chromosomes. To produce daughter cells, the chromosomes (total number of chromosomes (2n)) are copied before the cell splits into two daughter cells. This process is known as mitosis, and occurs in cell division and growth processes. Two new nuclei are formed, along with identical cells. These are the same as the parent cell and the chromosome number (2n) is maintained. Conversely in meiosis, the number of chromosomes (2n) is halved through meiotic divisions, producing 4 (n) germ cells (sperm or eggs), each containing half the number of chromosomes as its parent cell.

During the process of prophase I one the nuclear envelope containing chromosomes has only partly broken down homologous chromosomes are joined together by proteins and a complex or pairing call synapsis- corresponding genes on chromatids are aligned precisely. The syanpsis allows for crossing over which is the exchange of segments of chromosome, between non-sister homologous or similar chromatids crossing over happens at chiasmata, the point where non-sister chromosomes are joined.

Crossing over contributes to genetic variation and diversity; novel gene combinations in gametes are formed, which are not present in parent chromosomes. Genetic diversity describes all the genetic characteristics or traits within a species.

Learn more about mitosis at brainly.com/question/4303192

#LearnWithBrainly

6 0
3 years ago
Which BEST describes how crossing over increases genetic diversity?
Inessa05 [86]

Answer:

C

new combinations means variations, and the more the variations there is of a species, the more diverse they are

3 0
3 years ago
How many of the 8 actions mentioned in the May 7, 1933 Fireside Address provided jobs for unemployed people?
poizon [28]

Answer:

1 quarter of a million especially young men who have dependents to go into the forestry and flood prevention work.

4 0
2 years ago
Located in cytoplasm
Paul [167]

Answer:

in eukaryotic cells, the cytoplasm includes all of the material inside the cell and outside of the nucleus. All of the organelles in eukaryotic cells, such as the nucleus, endoplasmic reticulum, and mitochondria, are located in the cytoplasm.

Explanation:

8 0
3 years ago
Why is variety in crop plants important for food security?
aev [14]

Answer:

Disease and Famine

Explanation:

If there is a disease that affects a type of plant, having other types of crops to rely on could save one from starvation. Also, only planting one crop in an area can change the pH and nitrogen levels in negative ways, so that eventually no plants can grow there. Not to mention the obvious balanced diet needed for a healthy body.

4 0
2 years ago
Other questions:
  • Alan observed that a lot of soil from his garden swept off from after heavy rain. Which is this process called? A.groundwater re
    9·2 answers
  • Nuclear fusion is the combining of atomic nuclei to produce energy and new types of
    7·1 answer
  • During the first phase of the ovary cycle, the ______ matures within a follicle.
    13·1 answer
  • This is where two lithospheric plates meet and crash or crunch together. This process is responsible for mountain building, eart
    15·2 answers
  • When growing in windy environments, this organism will grow low along the ground, but when growing in sheltered environments, it
    10·2 answers
  • Uses a virus to transmit genetic material.
    10·1 answer
  • Since cognitive therapy focuses on changing thoughts rather than gaining deep insights into their causes, this kind of therapy i
    15·2 answers
  • After suffering a head injury, doctors discover that your
    12·1 answer
  • Which type of rat is selected for in this ecosystem?
    5·1 answer
  • D starch
    9·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!