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kolbaska11 [484]
3 years ago
11

Biotic factors cannot live without abiotic factors. True or false

Biology
2 answers:
Alisiya [41]3 years ago
5 0
The answer to the question is true 

VikaD [51]3 years ago
4 0
It is true. <span> rocks and air are abiotic could we live without them?

</span>
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Even though jellies can swim, why are they still classified as plankton?
Scilla [17]

Answer:

All plant and animal organisms that float or move to a limited extent in water, carried by currents and waves are called plankton.

Explanation:

Jellyfish are on the border of plankton and nekton. They are made of gelatinous tissue in which water makes up 98% of the body's composition. Simple anatomy, they have a single-opening digestive tract and a reticular nervous system.

7 0
2 years ago
Hairlessness in American rat terriers is recessive to the presence of hair. Suppose that you have a rat terrier with hair. Expla
Reil [10]

Answer:

By performing a test cross i.e. a cross with a recessive trait

Explanation:

According to the question, hairlessness is a recessive trait, meaning that it will only be expressed in a homozygous condition i.e. when there are two recessive alleles in the genotype. Presence of hair is dominant, meaning that it will mask the phenotypic expression of hairlessness allele in a heterozygous state. Hence, a dominant phenotype can either be homozygous (same dominant allele) or heterozygous (combination of dominant and recessive alleles).

In order to determine which of these genotypes the dominant phenotype possess, we perform a test cross. A test cross is a cross performed to determine the genotype of the dominant organism by crossing it with a homozygous recessive genotype.

Ideally, the offsprings resulting from the cross will all be phenotypically dominant if the organism in question is homozygous dominant but if the organism is heterozygous dominant, the offsprings will occur in an equal ratio of dominant to recessive phenotypes.

So in this case, all of offsprings of this cross between the rat terriers will possess hair if the dominant rat terrier dog is homozygous, but if the dominant rat terrier dog is heterozygous, an hairless offspring will be produced.

8 0
3 years ago
James was observing cells under a microscope. He observed some cells which had a layer outside the plasma membrane. What is this
irga5000 [103]
It's a cell wall, common to some types of cells, like plant cells (one notable component of the cell wall is <span>cellulose, which is exactly where we obtain it from</span>).
4 0
3 years ago
Read 2 more answers
What will a cold air mass do when it moves into a warm air mass
leva [86]

Your answer is B.

It's called an occluded front where the cold air meets the warm air underneath it. Hot air rises over cold air. :) Hope this helps you.

4 0
3 years ago
Why will the footprints left by Apollo astronauts last for centuries?
Nastasia [14]

Due, to know life on the moon there would be nothing to mess with the footprint, but the main reason why these footprints are going to last centuries is because "there is no weather." Since how there is no weather on the moon which means no wind there is no factors that could affect the footprint.

Hope this helps!

7 0
2 years ago
Read 2 more answers
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