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4 years ago

Explain what air pressure indicates with weather

Biology

1 answer:

zvonat [6]4 years ago

3 0

Answer:

changes

Explanation:Rising or steady pressure indicates clearing and cooler weather. Slowly falling pressure indicates rain. Rapidly falling pressure indicates a storm is coming.

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National parks reduce the human impact on land by _______. a. permitting limited human development. b. cleaning up litter c. pre

lord [1]

Answer – C (Preventing human development)

National parks are mainly established by national governments for conservation purposes, particularly the conservation of 'wild life' for future generations and as an emblem of national pride. National parks reduce the human impact on land by preventing human development.

3 0

3 years ago

Read 2 more answers

How do organisms reproduce?

PilotLPTM [1.2K]

Answer:

The organisms reproduce in two ways:

Asexual Reproduction– In this process, only a single parent is involved and no gamete formation takes place.

Sexual Reproduction– In this process, two parents are involved and gamete formation takes place. Meiosis is an important step in sexual reproduction.

Key Points on How do organisms reproduce

Reproduction is the process of producing new individuals of the same kind.
Organisms reproduce in two ways- asexually and sexually.
Asexual reproduction does not involve the fusion of male and female gametes. This takes place in bacteria, amoeba, hydra, etc.
Sexual reproduction involves the fusion of male and female gametes and can be seen in humans and many animals.
Fission, budding, vegetative propagation, fragmentation are some different types of asexual reproduction. It does not require any reproductive organs.
Sexual reproduction involves the reproductive organs of male and female.

3 0

4 years ago

Read 2 more answers

In humans there is a dominant allele (A) for the absence of moles; while the recessive allele (a) results in the presence of mol

Art [367]

Answer:

a. $(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

b. i. 0.75

ii. 0.000061

iii. 0.012

iv. 0.17

c. 0.67

Explanation:

a. The expansion of the binomial (p + q)7 would be such that:

$(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

b. Both couples are heterozygous:

Aa x Aa

AA Aa Aa aa

Since A is dominant over a,

probability of having mole (aa) = 1/4

probability of not having moles = 3/4

Therefore, the probability of the first child not having moles = 3/4 or 0.75

ii. Let the probability of not having mole = p and the probability of having mole = q. From the binomial expansion:

$(p + q)^7$ = $p^7q^0+7p^6q+21p^5q^2+35p^4q^3+35p^3q^4+21p^2q^5+7pq^6+p^0q^7$

Probability that all of the children will have moles = $p^0q^7$

since p = 3/4 and q = 1/4

$p^0q^7$ = $(3/4)^0(1/4)^7$ = 0.000061

iii. Probability that the first two children will have no moles and the last five will have moles = $21p^2q5$

= $21(3/4)^2(1/4)^5$

= 0.012

iv. Probability that 4 will have no moles and 3 will have moles out of the 7 children = $35p^4q^3$

= $35(3/4)^4(1/4)^3$

= 0.17

c. Probability that the child born without moles is a carrier of the a-allele = probability of heterozygous.

From the cross in (b), the genotypes of those born without moles are AA and 2Aa. Therefore, the probability of not having moles and be Aa is:

= 2/3 or 0.67

8 0

3 years ago

What are bananas made of

Kryger [21]

Potassium and a herb known as musa

6 0

3 years ago

Jason wanted to find out how he could increase the number of popcorn kernels that pop when cooked. He hypothesized that more ker

Ghella [55]

Answer:

This question is incomplete, it is asking to identify the following variables in the question:

Independent Variable: DIFFERENT AMOUNTS OF OIL

Dependent Variables: NUMBER OF KERNELS THAT POPPED

Controlled Variables: TIME FOR POPPING, SAME BRAND OF KERNEL, SAME COOKING TIME

Explanation:

The independent variable of an experiment refers to the variable that the experimenter intentionally manipulates or changes for the purpose of effecting a measurable response in another variable (dependent variable). In this experiment, the independent variable is DIFFERENT AMOUNTS OF OIL used because this is what Jason changes in the experiment.

Contrarily, the dependent variable is the variable that the experimenter measures in response to the independent variable. In this experiment, Jason measures the NUMBER OF KERNELS THAT POPPED from using different amounts of oil. Hence, the NUMBER OF KERNELS THAT POPPED is the dependent variable.

Controlled variables or constants are those variables that must be kept constant or unchanged throughout the experiment in order not to influence the findings of the experiment. In this case, the following variables were kept constant for all the groups: TIME FOR POPPING , SAME BRAND OF KERNEL (Pop rite), SAME COOKING TIME (4 mins).

7 0

3 years ago