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nasty-shy [4]
3 years ago
13

An adaptation is __________.

Biology
1 answer:
Komok [63]3 years ago
4 0

Answer:

The correct answer is - D. a reproductive advantage in the current environment.

Explanation:

Evolutionary adaptations are the adjustments and alteration of the physical structures of the organisms or their traits according to the environment change and it is hereditary. These adjustments or changes help in improving its ability to survive and reproduce and increase its number to pass the genes.

In other words, Evolutionary adaptations are characteristics or traits that are hereditary and enhance an organism's ability to survive and reproduce in a particular environment.

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What is the basic unit of structure and function in living things?
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The answer is A. a cell
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About an hour or so after a sperm enters the ovum, these two cells suddenly fuse, becoming one cell called __________.
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Answer:

A cell that results from the fusion of sperm and ovum is called a zygote. The process of fusion of sperm and ovum is called fertilization.

6 0
2 years ago
#14.. you can ignore 13 and 15
vlada-n [284]
The answer it’s D I hope ugly it right and good luck with ur test
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Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I
Bogdan [553]

Answer:

<u>Sister chromatids are identical  forms of chromatids  of a chromosomes. They are mostly  formed by semi-conservative replication of DNA molecule of a single  chromosome.Thus they  are  like  </u><u>'photocopies' </u><u> of  original parent  chromosomes; joined together at the Centromere</u>.

They are exactly similar in all ramification; with the same gene and allele compositions..

<u>However; slight differences  arise between the two identical sisters due to  </u><u>mutation</u><u> from</u><u> errors </u><u>at replication;and also in  the  length of telomere repeats.</u>

Non-sister chromatids are dissimilar forms of  chromatids of a chromosomes formed  when each half of  a chromosome  at fertilisation from separate   haploid sex-cells, of each parent. fused.They contain different genetic composition;because  they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

<u>However, they are genetically  similar in composition; if they  are contained in homologous chromosomes</u>. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by  chromosomal crossing-over between the non-sister chromatids  on the chromosomes ; therefore identical genetic characteristics are shared .

Explanation:

7 0
3 years ago
Small molecules that bind with self-proteins to produce antigenic substances are called ________. reagins antibodies haptens ion
puteri [66]
The answer will be haptens because haptens has the ability of combining to carriers that are large enough to produce antibodies. The large carriers are usually the proteins that binds to it after producing antibodies. The antibodies, ions and reagins does not comply in the question above for antibodies focus more in the immunization. The ions are the electrons that produce positive or negative electric charge and the reagins are the ones responsible in allergic reactions.
7 0
3 years ago
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