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
ValentinkaMS [17]
3 years ago
10

1.A scientist wants to prevent a culture of live cells from producing a particular protein. Which of the following will the scie

ntist MOST LIKELY modify to prevent the production of the protein? *
A.the DNA in the nucleus
B.an enzyme in the lysosomes
C.the polysaccharides in the cytoplasm
D.a phosopholipid in the cell membrane
2.Which of the following statements explains why the insertion of a nucleotide into a DNA sequence can result in a phenotypic change in the offspring? *
A.The DNA would no longer fit through the nuclear membrane to get to ribosomes for translation
B.The sequence of nitrogenous bases in the DNA would no longer code for the correct amino acids
C.Fatty acids would no longer attach to the DNA strands to transcribe the DNA
D.Antibodies would no longer recognize the DNA as belonging to the cell and would destroy the DNA
3.If the producers in a food web were removed, which of the following changes would most likely occur? *
A.The entire food web would collapse over time.
B.The food web would depend on the decomposers for energy
C.The consumers would begin making energy for the food web
D.The populations of the remaining organisms in the food web would increase
4.Prolonged periods of drought in an area cause decreases in plant population sizes. Which of the following statements describes how the decreases in plant population sizes then affect other populations in the area? *
A.Omnivore population sizes increase, and herbivore population sizes increase
B.Omnivore population sizes decrease, and carnivore population sizes increase
C.Herbivore population sizes increase, and carnivore population sizes decrease
D.Herbivore population sizes decrease, and carnivore population sizes decrease
5.The oceans have become increasingly acidic in recent years as the water absorbs more and more carbon dioxide from the atmosphere. This increased acidity interferes with the ability of corals to maintain their skeletons. In addition, an increase in water temperatures worldwide is causing coral bleaching, another condition that threatens the health of coral reefs. Based on this information, which of the following would most improve the health of coral reefs? *
A.reducing the use of fossil fuels
B.eliminating nuclear power plants
C.removing more natural gas embedded in rocks
D.replacing offshore oil drills with onshore oil drills
Biology
1 answer:
SIZIF [17.4K]3 years ago
4 0

1. Answer:   A

Explanation: For a cell to form proteins, the specific types of proteins are coded for by the genes in DNA (found in the chromosomes of the nucleus). To produce proteins, the genes are first transcribed by RNA polymerase to form messenger-RNA. The mRNA is then translated into proteins by ribosomes in the cytoplasm of the cell.

2. Answer: B

Explanation: Translation of genes into proteins is dependent on the sequence of nucleotides. They are translated in sequences of 3 nucleotides known  as codons. Therefore adding a nucleotide on a piece of DNA causes what is referred to as a frame-shift mutation. The 3 sequences (of codons) is interrupted and shifted by one nucleotide. Therefore, the codons change and the amino acids translated will also change.

3. Answer: A

Expanation: Producers are significant in a food chain because they incorporate the energy of the sun into the food chain. This is why they are at the base of the food chain and have the largest biomass. They are consumed by primary consumers which are consumed by secondary consumers which are consumed by tertiary consumers and so on.  

4. Answer: D

Explanation: Plants are consumed by herbivores. Therefore, a decrease in plant population due to drought was resulted to decrease in herbivore population. This is due to stiff competition by the herbivores for the scarce plant population. Carnivores consume herbivores. Due to a decrease in the herbivore population, then the carnivore population would also decrease.

5. Answer: A

Explanation: Burning of fossil fuels emits carbon dioxide gas which is a greenhouse gas. Greenhouse gas traps infrared wavelength of lights hence warming up the atmosphere, causing global warming. Reduction  in use of fossil fuels will hence alleviate an increase in global temperature hence protect coral in the oceans from bleaching.  

You might be interested in
The developmental period during which a being grows from a single cell to an organism complete with brain and behavioral capabil
Radda [10]

Answer:

Prenatal.

Explanation:

The sexual reproduction may be defined the process of fusion of the male sperm and female ovum that leads to the formation of the zygote. Zygote is diploid in nature.

The prenatal development includes all the stages that are involved in the development of the single cell till the completion of the nine months of the fetus. The development of all organs and the process of the cell specification all occurs in the prenatal development stage.

Thus, the answer is prenatal.

4 0
2 years ago
Read 2 more answers
Help taking it now worth 10 points
Karolina [17]

The Answer is the Intertidal Zone

3 0
3 years ago
Read 2 more answers
What are some similarities and differences between landslides and creeps? Thank you!
dimulka [17.4K]

Answer:

A mass movement can either be slow or rapid. The slow downward movement of materials in a slope is called creep. This happens when the soil loosens up because of water and burrowing animals. In contrast to this, the rapid movement of large materials in a slope is called landslide.

7 0
2 years ago
Which codon begins protein synthesis?
mr_godi [17]

Answer:

AUG

can u mark me brainliest plz?

Explanation:

3 0
3 years ago
I WILL MARK BRAINLIEST PLS HELP!!!!!!!!!
Mariana [72]
The answer is c.
i want brainiest
3 0
3 years ago
Read 2 more answers
Other questions:
  • When measuring the volume of a liquid in a graduated cylinder, you should read the measurement from the ______ of the meniscus.
    7·1 answer
  • What kinds of trees do temperature forests contain?
    12·1 answer
  • What are the causes of soil compaction?
    9·2 answers
  • When inhaled, crystalline silica can cause scar tissue to form on what organs?
    13·2 answers
  • Cognitive flexibility and better inhibitory control are both linked to higher levels of
    8·2 answers
  • Over time the cartilage in your body is replaced by solid bone and is usually complete by the time you stop growing.
    6·1 answer
  • Label each organism in the food chain below:<br> Seaweed Shrimp Crab Octopus
    8·1 answer
  • (GIVING BRAINLIEST!!)
    5·2 answers
  • Use the diagram below to answer the following questions for 1 point each:
    14·1 answer
  • All cells regardless of type build themselves, build tissues, and transport, and make products.
    6·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!