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maksim [4K]
3 years ago
15

What do scientists believe may have happened to leave Mars vulnerable to the solar winds?

Biology
1 answer:
ratelena [41]3 years ago
8 0
The outer core of Mars cooled too quickly and the magnetic field didn't have time to fully form so the solar winds destroyed the magnetic field and the atmosphere
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A recent study found that a relatively ____________ walking program of 12 weeks for men between 63 and 72 years of age brought a
BigorU [14]

he is right its short term,

BUT YOU SHOULD MAKE ME BRAINLIEST NOT HIM!!!

>:D

4 0
3 years ago
An element has an atomic mass number of 16 and an atomic number of 7.
professor190 [17]

16-7= 9 you subtract the atomic number from the mass and get the number of neutrons so there ae 7 protons and 9 neutrons

4 0
3 years ago
4. A homozygous dominant female is crossed with a heterozygous male, what
vesna_86 [32]

Answer: genotypic ratio 2/4

Phenotypic ratio 4/4 is the same

Explanation: suppose RR is the dominant female and Rr is the heterozygous male. Then after the cross genetically 2 have RR and 2 have Rr ratio. But phenotypically all 4 are the same.

5 0
3 years ago
What can be used to measure the rate of photosynthesis
zloy xaker [14]

Answer:thus, there are various methods to measure photosynthesis:

Uptake of CO2 by plants: Since CO2 is needed for photosynthesis, measuring how much of it is taken up by the plants gives us information on how much of photosynthesis is happening.

Release of O2: The amount of O2 produced during photosynthesis can be measured.

Explanation:

7 0
3 years ago
During which phase of meiosis does each of the following events occur?
lubasha [3.4K]

Answer:

(a) crossing over: Meiosis I, Recombination  

(b) chromatids separate at their centromeres and migrate to opposite poles: Meiosis II, Anaphase II

(c) chromosomes become aligned in pairs at the equator: Meiosis II, Metaphase II

Explanation:

Homologous recombination is a type of genetic recombination that occurs during meiosis (formation of ovum and sperm cells). The paired chromosomes of the male and female parents are aligned so that similar DNA sequences intersect. This crossing over produces an exchange of genetic material, which is an important cause of the genetic variability observed in the offspring.

Meiosis II: Anaphase II. The centromeres separate and the daughter chromatids - now individual chromosomes - move to the opposite poles of the cell. The centromeres separate, and the two chromatids of each chromosome move toward the opposite poles in the spindle.

Meiosis II: Metaphase II. Chromosomes are accommodated in the equatorial plate of metaphase, similar to what happens in mitosis. They are attached to the already fully formed meiotic spindle. Each chromosome is aligned in the equatorial plate of the metaphase, as it happens in mitosis.

6 0
3 years ago
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