BIOLOGY MIDDLE SCHOOL

Choose all the answers that apply.In some flower species, pink flowers are recessive and yellow flowers are dominant. A pink flower:
has two recessive genes
has one dominant and one recessive gene
has two equally dominant color genes
has a phenotype of pp
has the same genotype as a yellow flower

Answers

Answer 1
Answer:

Answer:

A and D are the correct answers.

Explanation:

A recessive gene can be defined as the one that can be masked by a dominant. In this case, the dominant gene causes the pink color.

The phenotype refers to the characteristics that can be seen by people, for example the shape, the color, among other things.

Due to this, options A and D are the answers.
Answer 2
Answer: The correct answer is 'has two recessive genes'. Since pink flowers are recessive, a pink flower must have two recessive genes in order for it to be pink. If there is even one dominant gene, the flower will be yellow. It is also true that the flower will have a phenotype of pp, since both genes are recessive and must be lowercase. Sorry; I didn't read the question carefully enough. : )

Hope this helps!

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identify three limiting factors that can prevent a population from increasing and explain how each factor limits a population's size

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1. There may not be enough room for the population to grow. Populations do not thrive when they are confined
2. Disease. When there is a big population, there is a higher chance of serious disease spreading and killing a lot of people. this happened in Athens during the war against Sparta
3. Lack of food. If a population is very big, there needs to be enough food. If there isn't enough food, people will starve and die.
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Choose all the answers that apply.By what method do mountains form?
erosion
weathering
faulting
folding
magma pushing up the crust
-------


How are sand dunes and deltas similar?
They are both formed by erosion.
They are both formed by weathering.
They both can be prevented by contour plowing.
They both have poor quality soil not suited for farming.
-----


Which of the following is an example of erosion?
a river carrying dirt into a lake
a volcano erupting and releasing lava
chemicals in water dissolving minerals in rock
friction between two rock surfaces grinding away minerals
-----


Which of the following is the most important condition for fossilization?
minerals in water
rapid burial
presence of oil or coal
large amounts of oxygen
------


Deltas _____.
form from deposited sediment
result from chemical weathering
form by volcanic eruptions
have very poor soil that cannot be used to grow crops
----


Choose all the answers that apply.

Fossils can tell us about:
climate
environment
organism structure
landforms
--


What happens when an oceanic and a continental plate collide?
the continental plate sinks below the oceanic plate
the oceanic plate sinks below the continental plate
mid-oceanic ridges are formed
the two plates break from the force
-----


Choose all the answers that apply.

Which of the following fossils are trace fossils?
amber
footprint
bone
tooth
shell

Answers

Answer: (1) Folding, (2) Both formed by erosion, (3)Water containing chemicals dissolves the rock minerals. (4) Rapid burial,

(5) Deposited sediment, (6) Climate & environment,

(7) Oceanic plate subducts below a continental plate,

(8) Footprints of organisms.

Explanation:

  • Mountains are formed due to the collision of two continental plates, which generates folding. For example, the Himalayas.
  • Sand dunes as well as deltas are erosional features caused by the agents wind and water respectively.
  • Water that are rich in chemical undergoes chemical reaction with the adjacent country rocks is an example of chemical erosion.
  • In order to be a fossil, the first step is immediate burial of the dead remains and should not come in contact with Oxygen.
  • Deltas are the region near the sea which are produced due to the accumulation of sediments.
  • Palaeoclimatic condition and palaeo-environment can be determined from a fossil study.
  • When an oceanic plate and  continental plate collides, the denser oceanic plate gets subducted under less dense continental plate.
  • Foot prints, mold and cast are the common trace fossils.
deltas and sand dunes form from erosion
 
a river carrying dirt into a lake is a example of water erosion

fossils can tell us about environments

when the oceanic and continental plate collide, the oceanic plate sinks below the continental plate

a footprint is a trace fossil 

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Answers

a layer of smooth cartilage at their ends, which cushions the bones and prevents them from rubbing directly against one another. The whole joint is also enclosed in a synovial capsule, which is full of synovial fluid. The synovial fluid acts like the oil in an engine, lubricating the joint and preventing the cartilage from becoming worn down.
The way joints are made, they naturally should not have trouble with west and tear. The other factor is the cartilage which acts as a kind of shield for the bone and this keeps you from getting arthritis unless you are unhealthy

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Answers

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Answers

Draw a table that is 2x2. On the top, write a capital R over on box and a lowercase r over the second. On the side, write a lowercase r next to one box and another lowercase r by the other. The top left box would have Rr. The top right would have rr. The bottom left would have Rr and the bottom right would have rr. The probability would be 50%. There is a 50% chance of having wrinkled seeds

One might infer that these diseases were the result of____.A.competition for space

B.lack of pollinators

C.introduced species

D.poor tree husbandry

Answers

One might infer that these diseases were the result of introduced species

Answer: Option C

Explanation:

Introduced species are the new species that are introduced to a new environment taken away from their home. It might have occurred due to natural occurrence or by physically introducing it to a new environment.

There are several examples citing the introduced species like bio control species to prevent using pesticides on plants. There are also chances for the newly introduced species to interact with the native species to produce hybrids which results in Genetic diversity. But certain times due to the introduction into the new environment it is highly prone to diseases.
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