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Ksju [112]
3 years ago
7

Characteristics of invertebrates​

Biology
1 answer:
Shkiper50 [21]3 years ago
7 0

Answer:

they don't have back bone.

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Megan left her bicycle outside on the patio while she went on vacation for several weeks. When she returned, Megan discovered a
harkovskaia [24]

 rusting of iron is a chemical change because it is two substances reacting together to make a new substance. When iron rusts, iron molecules react with oxygen molecules to make a compound called iron oxide. Rusting would only be a physical change if iron molecules remained pure iron throughout the process.

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Explain how local environment changes can have global effects.
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4 years ago
During anaphase 1 chromosomes in the homologous pair
lora16 [44]

During anaphase 1 chromosomes in the homologous pair moves to the opposite poles.

<h3><u>Explanation:</u></h3>

The chromosomes that are having their pairs with similar length, position of centromere and staining pattern refers to the homologous chromosomes. These chromosomes have genes with the corresponding loci. One of these chromosomes will be inherited from the father and the other will be inherited from the mother.

The chromosomes in the pair gets attached to the fibers from the opposite poles. The chromatids that are sister will get attached to the fiber from the same poles. The centromere will not get divided during the anaphase 1 and thus the homologous chromosomes will move to the opposite poles. This causes the homologous chromosomes to get separated.

6 0
3 years ago
Which of the following are necessary for a seed to germinate?
IceJOKER [234]

Answer:

The question lacks options, the options are:

A. moisture content of seed must be at least 9%

B. Moisture content of the seed must be less than 9%

C. certain enzymes in the seed are activated

D. temperature must be above 80 degrees

E. temperature must be below 80 degrees

The answer is A

Explanation:

Germination is practically the very first step of every seed-producing plant. It is the process whereby seeds sprout or begin to grow. Germination requires certain conditions to be met in order to occur. This conditions include presence of moisture in the soil etc.

The water is absorbed by the seed helps to soften the seed coat, which protects the seed from damage. The seed coat ruptures, causing the emergence of growth structures from the seed. In general, seeds need water to activate their dormant physiology. Hence, the moisture content of the seed must not be lower than 9%.

3 0
3 years ago
20 points!!!
Free_Kalibri [48]

Answer:

The phenotype of the brown parent would be heterogeneous.

Explanation:

As albino is a recessive trait, both the alleles should be recessive for this trait to occur.

A punnet square is a diagram which is made to illustrate the possible phenotype of the offspring.

If the brown parent will be homologous, then a cross with albino parent  will produce offspring with brown color having heterogeneous phenotype.

For production of albinos the brown parent should be heterogeneous for the trait.

3 0
3 years ago
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