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lana66690 [7]
3 years ago
12

Since the endangered species act of 1973 was passed, about ______ species of animals and ______ species of plants and lichens ha

ve been placed on the list of threatened or endangered species.
Biology
1 answer:
shepuryov [24]3 years ago
3 0
Since the endangered species act of 1973 was passed, about 575 species of animals and 750 species of plants and lichens have been placed on the list of threatened or endangered species.
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Why are identical twins exactly similar while fraternal twins are dissimilar ??​
sergij07 [2.7K]

Answer:

Fraternal twins are “dizygotic,” meaning that they developed from two different eggs fertilized by two different sperm cells, while identical twins are “monozygotic” i.e., they developed from a single fertilized egg that split.

Explanation:

7 0
3 years ago
Human females produce gamete cells that have what chromosomes
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Which are the physical (P), chemical (C), and biological (B) immune responses?
Alenkinab [10]

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4 0
3 years ago
Which type(s) of cell division (mitosis, meiosis l, meiosis Il) reduce(s) the chromosome number by half? Which type(s) of cell d
PSYCHO15rus [73]

Answer:

Which type(s) of cell division reduce(s) the chromosome number by half?

                           Meiosis l

Which type(s) of cell division can be classified as reductional?  

                            Meiosis I

Which type(s) of cell division can be classified as equational?

                           Mitosis and Meiosis II

Explanation:

Meiosis is a type of cell division which occurs in the germ or reproductive cells to produce gametes. It is completed in the two stages, meiosis I and meiosis II.  The cells which are going to divide by meiosis are diploid having two sets of chromosomes. Meiosis I is the first stage of the meiosis. At the end of meiosis I two daughter cells are formed having only 1 set of chromosomes and chromosome numbers are reduced to half. Thus, meiosis I is a reductional division.  

Mitosis and meiosis II is the equational division as after division chromosome number remains the same as in the parent.  

6 0
3 years ago
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