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3 years ago

Which statement about solar eclipses is false?

Biology

1 answer:

SVETLANKA909090 [29]3 years ago

7 0

I guess the answer is most likely b) they are rare.

solar eclipses can occur fairly often, sometimes 2-4 times a year

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A tall plant crossed with a short one produced offspring, of which about half are tall and half are short. What are the genotype

stellarik [79]

Answer:

Rr x rr

Explanation:

Let's say

RR is a tall plant.

Rr is tall

& rr is a small plant

The only genotypes you can get to make two tall and two short is if you use a hetero pair and a same ressesive (rr) genes.

4 0

2 years ago

What do you notice when moving the slide around the stage?

frosja888 [35]

Answer:

It's the same there is no change.

6 0

3 years ago

Read 2 more answers

How are simple carbohydrates able to form larger macromolecules

madreJ [45]

Answer:

Carbohydrates can be described as biological molecules which are made up of carbon, hydrogen and oxygen.

Simple carbohydrates are known as monosaccharides. Example of monosaccharide includes glucose and fructose. Two molecules of monosaccharides can join to form disaccharides. Example of disaccharide includes maltose. When three or more monosaccharides join they form polymers known as polysaccharides. In this way, simple carbohydrates form larger molecules or polysaccharides. Examples of polysaccharides include starch, glycogen, cellulose etc.

5 0

3 years ago

What is the net gain in ATP in glycolysis?

Butoxors [25]

Glycolysis, the first process in cell respiration, produces four ATP, but it uses two of the ATP molecules, therefore producing a net two ATP molecules. The process also yields two molecules of NADH.Glycolysis begins with glucose and breaks it down into two molecules of phosphoglyceraldehyde.

Hope this helps

7 0

3 years ago

Read 2 more answers

Choose the true statement(s) about mutations. To be marked correct, you'll need to select all true statements, as there may be m

Kazeer [188]

Answer

All four options ( A,B,C,D ) are true about mutations.

Explanation:

A- Mutation can provide an evolutionary benefits

As mutation helps in creating DNA sequence ,new allele(variant of gene) for a specific gene , thus mutations is known to be the first step of evolution.

B- Mutation leads to genetic and phenotypic variation within the species.

In mutation, genetic variation (difference between individual/population) takes place as new alleles are created ,random matings ,fertilization and during meiosis , recombination of homologous chromosomes. One of the type of mutation called gene mutation give rise to genetic variations.

Its an exceptional case of phenotypic variations ,as mostly there is no effect of mutation on phenotypic variation. Very few mutations lead to phenotype variation and in case mutation takes place in phenotype variation ,making the organism well suited to the environment, the a rapid change in the characterstics of the individual species is seen.

C- In humans, the somatic cell mutation are not passed in offsprings.

Somatic cells are present in all over the body except in the cells that give rise to gametes( ie. egg and sperm cells) and produces offsprings . Thus somatic cells are absent in gametic cells ,therefore mutation cannot be passed to human's offsprings or children.

D- Evolution rates are faster in bacteria than in humans because most mutations in human cells are silent.

Due to their fast growth ,bacteria evolve quickly and share genes with each other and even between the species ,also the mutation that are helpful spread faster in bacteria.

In humans, the silent mutation in human cells cause many genetic disorders like Laron dwarfism. About 99.8% genes are silent mutation.

7 0

3 years ago