BIOLOGY HIGH SCHOOL

Some plants have leaves that are poisonous to some animals. Which kind of adaptation is this? (1 point)Survival
reproduction
respiration
defense​

Answers

Answer 1
Answer:

Defense is mechanism of adaptation by which some plants have leaves that are poisonous to some animals.

Poisonous plants are those herbs, flowers, shrubs or fruits that are toxic enough to harm the body of people as well as dogs, cats and other animals.

The defense mechanisms that plants have developed are very varied and among them are physical adaptations such as thorns or the synthesis of chemical substances that can inhibit consumption by predators and some with antimicrobial effects.

During the evolutionary process, all organisms have been attacked by viruses, bacteria and fungi; likewise, they are consumed as a source of nutrients by different herbivorous animals and vertebrates.

In response to external factors that limit the normal development of plants, they have developed various defense mechanisms ranging from anatomical adaptations to chemical defense.

The chemical substances produced by plants as defense, are very varied, have different functions, inhibit the action of pathogens and prevent their attack, others cause negative effects at different levels, such as irritation on contact, nausea or gastric disorders.

Some of these compounds are saponins, phenolic compounds that include phenolic acids, and complex polymers such as tannins and lignin have the ability to cause pharmacological and toxicological effects in animals.

Therefore, we can conclude that plants have developed various defense mechanisms as chemical defense by which some plants have leaves that are poisonous to some animals.

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Answer 2
Answer:

Answer:

this is for defence

Explanation:

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.P indicates the allele for purple flowers and p indicates the allele for white flowers. Which statement about the offspring is correct? P p P p A. 25% will be heterozygous, 25% will be homozygous dominant, 50% will be homozygous recessive B. 50% will be heterozygous, 0% will be homozygous dominant, 25% will be homozygous recessive C. 75% will be heterozygous, 25% will be homozygous dominant, 0% will be homozygous recessive D. 50% will be heterozygous, 25% will be homozygous dominant, 25% will be homozygous recessive

Answers

The answer is D because:

by using a punnett square we get the following values:

PP - Homozygous Dominant (two uppercase letters)
Pp - Heterozygous Recessive (one lower case)
Pp - Heterozygous Recessive (one lower case also)
pp - Homozygous Recessive (two lowercase letters)

Answer:

D. 50% will be heterozygous, 25% will be homozygous dominant, 25% will be homozygous recessive

Explanation:

The purpose of a Punnett square is to illustrate the possible allele combinations that can be inherited by the offspring of two parents

In humans, aniridia, a type of blindness, is due to a dominant allele A. Migraine headaches are due to another dominant allele M. If a man who suffers from both conditions (AaMm) marries a woman who suffers from both (AaMm), what are the chances of an offspring expressing both traits?

Answers

Answer:

9/16

Explanation:

This is a typical dihybrid cross involving two genes; one coding for anridia (form of blindness) and the other for Migraine headache, both in humans. The allele for possessing anridia (A) is dominant over the allele for not possessing it (a) in the first gene, while the allele for having Migraine headache (M) is dominant over the allele for not having it (m) in the second gene.

A cross between a man that is heterozygous for both genes (AaMm) and a woman also heterozygous for the two genes (AaMm), this means that both parents are dominant for the two traits i.e. they both possess anridia and migraine headache.

Both parent cells will undergo meiosis to produce four possible combination of gametes in which the alleles are independent of one another in the gametes, according to Mendel's law of independent assortment. The gametes are: AM, Am, aM, am

These gametes are crossed using a punnet square (see attached image) to produce 16 possible offsprings in a phenotypic ratio of 9:3:3:1.

9- Offsprings with both anridia and migraine

3- Offsprings with only anridia but without migraine

3- Offsprings with only migraine but without anridia

1- Offsprings without both anridia and migraine

According to the question, the chance of an offspring expressing both traits i.e. having both anridia and migraine headache is 9/16

What are the 4 stages of mitosis and what does each stage do?

Answers

prophase, metaphase, anaphase, and telophase

If the parent function f(x) = x2 is modified to g(x) = 2x2 + 1, which statement is true about g(x)?A. It is an even function.

B. It is an odd function.

C. It is both an even and an odd function.

D. It is neither an even nor an odd function.

Answers

The right answer is A. It is an even function.


A function is said to be even if its graph is symmetric with respect to the y-axis, that is:


y=f(x) \ is \ \mathbf{even} \ if, \ for \ each \ x \ in \ the \ domain \ of \ f:\n \n f(-x)=f(x)


Since:

g(x)=2x^2+1 \ and \n \n g(-x)=2(-x)^2+1 \therefore g(-x)=2x^2+1 \n \n \therefore \boxed{g(x)=g(-x)}
If f(-x) = -f(x) that the function is odd. If  f(-x)=f(x) then the function is even.

g(-x) = 2(-x)^2+1 = 2x^2+1 = g(x). The function is even.
The answer to your question is A.
I hope that this is the answer that you were looking for and it has helped you.

when salt is used to preserve food , the food is___________A . cooled B . coated C.canned Do dehydrated​

Answers

Answer:

D-Dehydrated

Explanation:

Salt draws all the water and moisture put of a food making it dehydrated

All of the following factors affect an area s biodiversity EXCEPTa. area.
b. number of endangered species.
c. climate.
d. diversity of niches.

Answers

All of the options enlisted here (area, climate, diversity of niches) affect an area's biodiversity except number of endangered species. That in no way affects an area's biodiversity, whereas the other options certainly do. 

Answer:

D

Explanation:
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