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nignag [31]
3 years ago
11

Which is required for sexual reproduction?

Biology
2 answers:
m_a_m_a [10]3 years ago
8 0

Answer:

Meiosis

Explanation:

Haploid number of chromosomes

Tema [17]3 years ago
8 0
Mitosis is the correct answer!
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Every year _______ species go extinct. a. 3 b. 72 c. 1000 d. 20000 please select the best answer from the choices provided
Galina-37 [17]

The experts calculate that between 0.01 and 0.1% of all species will become extinct each year. If the low estimate of the number of species out there is true - i.e. that there are around 2 million different species on our planet - then that means between 200 and 2,000 extinctions occur every year.

What is extinction?

  • Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species.
  • The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and recover may have been lost before this point. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the fossil record) after a period of apparent absence.
  • More than 99% of all species that ever lived on Earth, amounting to over five billion species, are estimated to have died out.
  • It is estimated that there are currently around 8.7 million species of eukaryote globally, and possibly many times more if microorganisms, like bacteria, are included. Notable extinct animal species include non-avian dinosaurs, saber-toothed cats, dodos, mammoths, ground sloths, thylacines, trilobites and golden toads.
  • Through evolution, species arise through the process of speciation—where new varieties of organisms arise and thrive when they are able to find and exploit an ecological niche and species become extinct when they are no longer able to survive in changing conditions or against superior competition.
  • The relationship between animals and their ecological niches has been firmly established.
  • A typical species becomes extinct within 10 million years of its first appearance, although some species, called living fossils, survive with little to no morphological change for hundreds of millions of years.

To learn more about extinction: brainly.com/question/14482178

#SPJ4

7 0
2 years ago
A Bb guinea pig crosses with a Bb guinea pig. All of the four offspring are black. How did this happen?
s2008m [1.1K]

Answer:

The chance for having black offspring is 75% while for white, the recessive gene is 25%.

Explanation:

The chance for black offspring is a higher chance than white and that's why all of the offspring are black.

4 0
3 years ago
The autonomic nervous system exerts its influence on
Andru [333]
The autonomic nervous system releases chemical messengers to influence its target organs
3 0
3 years ago
36. how can you increase surface area but not volume of an object? biology
solong [7]
Folds, wrinkles, etc!
by folding the membrane of an organelle, surface area is optimized while volume remains the same. that is why mitochondria looks folded on the inside when you see pictures of it. the higher the surface area to volume ratio, the more efficient the organelle.
3 0
2 years ago
Base your answer on the chemical equation shown in the diagram below and on your knowledge of biology.
Nastasia [14]

Answer:

The correct option is;

A, B, and C, only

Explanation:

The amino group is the functional group of the form CH-NH₂ consisting of single bonds formed between hydrogen atoms, aryl groups, alkyl groups or two or more of such groups combined together bonded with a nitrogen atom. An amine is an organic compound that has an amino group in its composition or structure

Therefore, the amino group can be found in the molecules of A, B, and C only.  

8 0
3 years ago
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