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
mrs_skeptik [129]
2 years ago
14

Pls help with this Q

Biology
1 answer:
GarryVolchara [31]2 years ago
8 0
D because they are complete systems
You might be interested in
Which of the following best describes rust?
olga nikolaevna [1]

Answer:

irreversible chemical change

Explanation:

A chemical change always results in a new substance and as it is not possible to reverse it, it is an irreversible chemical change.

I hope you understood :)

3 0
3 years ago
In man, assume that spotted skin (S) is dominant over non-spotted skin (s) and that wooly hair (W) is dominant over non-wooly ha
Brut [27]

Answer:

Total four genotypes and its frequency  

SsWw – 4/16

ssWw- 4/16

Ssww - 4/16

ssww - 4/16

Phenotype –  

SsWw – Heterozygous  Spotted skin and heterozygous wooled hair

ssWw  - Homozygous non-spotted skin and heterozygous wooled hair

Ssww  -  Heterozygous  Spotted skin and Homozygous non -wooled hair

ssww  - Homozygous non-spotted skin  and Homozygous non -wooled hair

Explanation:

Given -

Allele for spotted skin is "S"

Allele for non-spotted skin is "s"

Allele for Wooly hair is "W"

Allele for non-wooly hair is "w"

Allele "S" is dominant over "s"

And Allele "W" is dominant over "w"

Cross is carried out between heterozygous spotted, non-wooly man and heterozygous wooly-haired, non-spotted woman

Genotype of heterozygous spotted, non-wooly man - Ssww

Genotype of  heterozygous wooly-haired, non-spotted woman - ssWw

Ssww * ssWw

Sw         Sw         sw         sw

sW SsWw SsWw ssWw ssWw

sw Ssww Ssww ssww ssww

sW SsWw SsWw ssWw ssWw

sw Ssww Ssww ssww ssww

Total four genotypes and its frequency  

SsWw – 4/16

ssWw- 4/16

Ssww - 4/16

ssww - 4/16

Phenotype –  

SsWw – Heterozygous  Spotted skin and heterozygous wooled hair

ssWw  - Homozygous non-spotted skin and heterozygous wooled hair

Ssww  -  Heterozygous  Spotted skin and Homozygous non -wooled hair

ssww  - Homozygous non-spotted skin  and Homozygous non -wooled hair

8 0
3 years ago
Summarize what the researchers did to improve the quality of post mining site soil
Salsk061 [2.6K]

Answer:

The researcher centred on the potential uses of biochar, charcoal primarily used for agricultural and to improve the quality of post mining sites.

A method called mountaintop removal was used by mining firms. This means that they remove rock and mineral deposits off the top of the mountain to gain access to within the coal seams. The resulting soil is infertile and strongly acidic. The compacted soil after mine proves harder to  bring seed into the soil.

The researchers  try to use biochar to help reforest the soil at the post-mining site. Before it was reseeded and replanted, they got permission to add a layer of biochar to a post-mining site. the team created “planting cells” of biochar‐enhanced soil on the post‐mining site and that showed improvment in the sapling growth.

4 0
3 years ago
Which are the most dominant chemolithotrophs in pelagic waters?
Tomtit [17]
<span>The most dominant chemolithotrophs in pelagic waters are ammonia-oxidizing archaea. The first step in nitrification is performed by ammonia oxidising microorganisms that convert ammonia into nitrite ions. Science has known about nitrifying bacteria for over a hundred years now thanks to the discovery of S. Winogradsky.</span>
8 0
3 years ago
Q:- You may have heard through various media of an animal alleged to be the hybrid of a rabbit and a cat. Given that cat (Felis
weeeeeb [17]

Answer:

41 chromosomes

Explanation:

Cats have a dipoid chromosome number of 38, <u>so their gametes will have half that number: an haploid number of 19 chromosomes</u>.

Rabbits have a dipoid chromosome number of 44, <u>so their gametes will have an haploid number of 22 chromosomes</u>.

When a cat gamete (n=19) joins with a rabbit gamete (n=22) to form the hybrid zygote, it will have 19+22=41 chromosomes. When it undergoes mitotic division, all its somatic cells will have 41 chromosomes.

6 0
3 years ago
Other questions:
  • Why do temperatures on the moon’s surface vary so much?
    6·2 answers
  • Describe what is happening in each stage and what each stage looks like: Prophase Prometaphase Metaphase Anaphase Telophase Cyto
    13·2 answers
  • How can bacteria fight pathogens
    9·2 answers
  • Which of the following describes an interaction between the endocrine system and the excretory system?
    7·2 answers
  • Which neurotransmitter does lsd principally operate on? dopamine serotonin acetylcholine norepinephrine?
    13·1 answer
  • How do land and water temperatures affect air pressure?
    14·1 answer
  • Sulfur combines with atmospheric ______ to form sulfuric acid.
    10·1 answer
  • Using depressants can cause loss of coordination, slurred speech, confusion, and a slowed heart rate. These symptoms can lead to
    15·1 answer
  • Where does all energy for most organisms on earth come from?
    10·2 answers
  • How does the immune system work with other body systems to protect the body from pathogens?
    8·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!