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aliya0001 [1]
3 years ago
10

Which is a defining trait of a mineral? A. amorphous B. made of carbon C. shiny D. definite chemical composition

Biology
1 answer:
zlopas [31]3 years ago
5 0
<span>The physical characteristics of minerals include traits which are used to identify and describe mineral species. These traits include color, streak, luster, density, hardness, cleavage, fracture, tenacity, and crystal habit.</span>
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What are three types of homologies that can be seen in organisms? Give example of each homologous?
Vaselesa [24]

Answer:

1. Iterative homology: e.g. antenna and leg of fiddler crab

2. Ontogenetic homology: e.g. radular teeth of veliger, feathers of chicken and hen

3. Di-polymorphic homology: e.g. white and brown feathers of hen races, chelae of male and female of fiddler crabs

4. Supraspecific: e.g. chelae of fiddler crab, chelae of lobster, feathers of hen and pheasant

Explanation:

7 0
3 years ago
A scientist argues that two species of birds are the same species because they have similar body structure, similar DNA, and sim
user100 [1]

Answer;

D. The birds have different mating seasons.

Explanation;

-Different species of birds have different mating or breeding seasons. Evolution has played a role in adjusting the timing of avian(birds) breeding seasons to maximize the number of young produced. The breeding season depends on a number of factors, for example In the temperate, subarctic, and arctic zones, the overriding factor is the availability of food. This varies across all different species of birds, irrespective of other similarities they may have.

4 0
3 years ago
Read 2 more answers
The parent cell that enters meiosis is diploid, whereas the four daughter cells that result are haploid.
abruzzese [7]

Answer:

option d

Explanation:

Meiosis stage was formerly called the reduction stage involving two divisions; meiosis I and II. After the first stage of meiosis, the ploidy level of each of the daughter cell changes is in an haploid state, meaning here the DNA content has been reduced by half. In humans (2n = 46), who have 23 pairs of chromosomes, the number of chromosomes is reduced by half at the end of meiosis I (n = 23). This haploid state is still maintained by the meiosis II just undergoing the normal mitosis division.

4 0
3 years ago
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The PCR reaction mixture does not include: Group of answer choices DNA containing the sequence to be amplified. DNA ligase. all
Anit [1.1K]

Answer: DNA ligase.

Explanation:

Polymerase chain reaction is a technique used in molecular biology by scientists to make several copies of a DNA sample which enable them to take a smaller portions of it and expand it for more detailed study.

PCR mixture is premixed and contain thermostable DNA polymerase, oligonucleotides primer, four deoxynucleodide triphosphates, Magnesium chlorides, a propietary buffer.

4 0
3 years ago
Which of the following statements about the light reactions of photosynthesis is true? a. There are two distinct photosystems, l
Natali5045456 [20]

Answer:

Option (A).

Explanation:

Photosynthesis may be defined as the process in which the light energy has been converted to the chemical energy so that plants can obtain their food with the help of sunlight, carbon dioxide and water.

Photosynthesis is divided into light reaction and dark reaction. The light reaction of photosynthesis is linked together by the mechanism which is similar to the electron transport chain of mitochondria.

Thus, the correct answer is option (A).

8 0
3 years ago
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